01
Understand the ingredient.
See the form, serving amount, and research context. A familiar ingredient name is the starting point for a closer look.
THE OYAH APPROACH
OYAH HEALTH / SCIENCE & QUALITYGood science.
Good science.
Clear standards.
Your daily OYAH.
A closer look at your daily routine. Explore the ingredients, understand the research, and ask for the quality documents behind your product.
THE DETAILS BEHIND YOUR DAILY ROUTINEConfidence starts
Confidence starts
with a clearer picture.
Your supplement should have a clear purpose—and the information to help you understand it. At OYAH, we bring product details, published ingredient research, and certificates of analysis into one place so you can make a more informed choice.
02
Read the evidence.
Explore human studies, who took part, what researchers measured, and how closely the study matches the product.
03
Check the documents.
Request the certificate for your product and lot. Read the reported tests, specifications, and results together.
QUALITY / A CLOSER LOOKWhat goes in.
What goes in.
What gets measured.
What you can check.
A certificate is useful when you understand what it covers. These are the main areas to look for in product documentation. The tests listed on each report define its scope.
Identity.
Amount.
Purity.
Traceability.
Amount.
Purity.
Traceability.
Four questions that turn a quality claim into something you can inspect.
Ingredient identity & amount
Identity checks that the tested material matches the expected ingredient. Potency or content measures the amount of a specified component, where the report includes an assay.
Check the units, serving basis, specification, result, and method. A listed ingredient quantity and a separately measured active-marker assay are different pieces of information.
Microbial quality
A report may include total microbial counts, yeast and mould, and tests for specified organisms. Read each result against its stated limit.
“Not detected” refers to the method and sample tested. It does not mean a product is sterile. Probiotic products need an interpretation appropriate to their intended live microorganisms.
Heavy metals & other contaminants
Where testing appears on the report, look for the actual result, unit, detection limit, and specification for each analyte. Lead, cadmium, arsenic, and mercury require separate entries or a clearly defined panel.
A microbial result does not establish a heavy-metal result. A test for one contaminant does not establish the absence of every possible contaminant.
FDA regulation and manufacturing documentation
Dietary supplements are regulated by the FDA as a category of food, not approved as drugs before sale. Companies remain responsible for product safety, compliant manufacturing, truthful claims, and accurate labels. FDA can inspect facilities, monitor the market, review reports, and act against adulterated or misbranded products.[1]
Current Good Manufacturing Practices concern production controls. A facility registration, GMP certificate, product certificate, and laboratory report cover different questions. None means that the FDA approved or endorsed the finished supplement.
Lot details, dates & storage
Match the product name and lot number, then check the manufacturing, report, and expiry dates where provided. These details connect the certificate to the product tested.
A test at one point in time does not establish potency throughout shelf life. Read the label’s storage instructions and ask for stability information when that is the question you need answered.
CERTIFICATES OF ANALYSISYour product.
Your product.
Your questions.
The actual document.
We have certificates of analysis for our products. Choose your product and include the lot number from your bottle so our team can help you find the relevant report.
01Choose your
OYAH product.
OYAH product.
02Add your bottle’s
lot number.
lot number.
03Read the report
and its test scope.
and its test scope.
A COA reports quality measurements. Clinical research answers a different question: how an intervention affected people.
Find your product’s report
Request this COAOpens an email to hello@oyahhealth.com. Add a photo of your label if you need help identifying the lot.
INGREDIENT SCIENCE / PRODUCT BY PRODUCTThe research.
The research.
The relevance.
The full picture.
Explore selected research connected to 15 OYAH formulas. Each spotlight explains what researchers studied and how it relates to the product. These publications did not test an OYAH finished formula.
Showing 15 formula spotlights · Expand any card for study details and product relevance.
Focus & clarity
Cognitive Performance
Look at the ingredient combination—and the dose.
OYAH’s formula includes caffeine, L-theanine, Bacopa monnieri, niacin, vitamin B6, and other ingredients. Different ingredients have different research histories.
- Research focus
- Caffeine + L-theanine
- Foundational trial
- 27 adults · crossover design
- Study amounts
- 50 mg caffeine + 100 mg L-theanine
Study findings & product relevance
Owen and colleagues compared caffeine, caffeine with L-theanine, and placebo in 27 healthy volunteers. The combination improved selected attention-switching and distraction measures at specific time points. This was a small, short-term experiment, not a test of long-term memory or work performance. A separate 2025 Bacopa trial found no benefit on its primary cognition outcomes, despite some secondary stress and fatigue findings.[5] [6]
How this relates to OYAHThe published ingredient list alone does not establish that OYAH supplies the amounts or branded extracts studied. Read the complete label before comparing doses. Evidence varies across this formula’s ingredients.
Brain energy & cognition
Creatine Monohydrate
Creatine belongs in the cognition conversation.
Creatine supports the phosphocreatine energy system in the brain as well as muscle. Human research has examined memory, attention, processing speed, sleep deprivation, healthy ageing, and physical performance.
- Ingredient
- Creatine monohydrate
- Research focus
- Memory, attention & processing speed
- Evidence status
- Promising, but unsettled
Study findings & product relevance
A 2024 systematic review and meta-analysis reported favourable findings for some cognitive outcomes in adults. A 2026 methodological commentary identified double-counting of correlated test results and noted that a corrected analysis of earlier memory data was no longer significant overall, apart from older-adult findings. The cognitive evidence therefore deserves attention, but it does not support a guaranteed improvement in focus, memory, grades, work performance, or daily mental energy.[2] [3]
How this relates to OYAHThis research is relevant beyond athletes: people who study, work, parent, age, or train may be interested in brain-energy research. Activity level does not decide who can read or discuss the evidence. Individual studies still use different doses, durations, cognitive tests, diets, ages, and health profiles. They did not test OYAH’s finished product. If you are pregnant or breastfeeding, ask your healthcare professional before using creatine because human safety evidence in these groups remains limited.
Evening routine
Magnesium Glycinate
The mineral form matters. So does the amount.
The current OYAH product page lists 275 mg of elemental magnesium per daily serving of three capsules. Elemental magnesium tells you how much magnesium the serving provides.
- OYAH serving
- 275 mg elemental magnesium
- 2025 trial
- 155 enrolled · 4 weeks
- Studied dose
- 250 mg elemental magnesium/day
Study findings & product relevance
A 2025 randomized, placebo-controlled trial enrolled 155 adults reporting poor sleep. Insomnia Severity Index scores fell by 3.9 points with magnesium bisglycinate and 2.3 points with placebo. The between-group result narrowly met statistical significance (p = 0.049), and the reported effect was small (Cohen’s d = 0.2). The study relied on self-reported outcomes and lasted four weeks.[4]
How this relates to OYAHThe study used another manufacturer’s bisglycinate product and 250 mg of elemental magnesium per day, compared with the 275 mg daily serving listed for OYAH. It informs the ingredient discussion but does not prove the same effect for OYAH or establish treatment for insomnia.
Nutrition & digestive context
GLP-1 Support
Nutrition support needs an individual plan.
The current formula lists micronutrients, ginger, peppermint, digestive enzymes, Bacillus coagulans, ashwagandha and black pepper. It contains iron and vitamin B6; review total intake across your routine.
Study findings & product relevance
This dietary supplement is not a GLP-1 medicine or a substitute for prescribed treatment. Nutrition advisories discuss dietary assessment, protein, micronutrient needs and clinical follow-up; they did not test OYAH. We do not claim this formula raises GLP-1, causes weight loss or prevents medication side effects. If you use GLP-1 medication, ask your prescriber or pharmacist to review the complete label. [17] [16] [18]
Read the ingredient contextOpen the related guide ↗
Calm & balance
Bye Stress
Ashwagandha research is specific to the preparation.
The OYAH ingredient list identifies ashwagandha root and black pepper. Research often uses extracts with a defined withanolide content, which can differ from a root preparation.
- Ingredient focus
- Ashwagandha
- 2025 trial
- 90 adults · 84 days
- Studied preparation
- 125 mg/day Zenroot™
Study findings & product relevance
A 2025 randomized, double-blind trial tested a proprietary preparation containing 1.5% total withanolides in adults with mild to moderate stress. It reported improvements in perceived stress and several secondary measures. Cortisol and salivary alpha-amylase did not differ significantly between groups. The paper includes authors with commercial affiliations connected to the studied ingredient.[7]
How this relates to OYAHOYAH does not list Zenroot™ in its ingredient list. This is context for ashwagandha research, not proof of an equivalent preparation, dose, or outcome for Bye Stress.
Gut & daily wellness
Colostrum
A closer look at colostrum and the gut barrier.
OYAH’s current product copy lists 500 mg of bovine colostrum with a 30% IgG ingredient specification. Colostrum is milk-derived.
- Current product copy
- 500 mg per capsule
- Ingredient specification
- 30% IgG
- Research focus
- Intestinal permeability
Study findings & product relevance
A 2024 meta-analysis reported lower intestinal permeability with bovine colostrum, while calling for more trials across product quality, dose, and duration. A small 2017 trial involved 16 athletes over 20 days and used 500 mg twice daily. Its size and specialized population limit broad conclusions.[8] [9]
How this relates to OYAHAn IgG specification describes the ingredient composition; it does not measure clinical benefit. Research preparations can differ in processing and composition. Use a certificate that matches the formula and lot on your bottle.
Digestive routine
Probiotic 20 Billion
The right detail goes beyond a CFU count.
The OYAH product page lists 13 bacterial species. To connect a clinical result to a probiotic, the strain identifier and viable count matter alongside the species name.
- Product name
- 20 Billion
- Published ingredient list
- 13 species
- Evidence match
- Strain-specific assessment
Study findings & product relevance
The NIH Office of Dietary Supplements explains that probiotic effects can depend on the specific strain. A study on one strain cannot automatically support every product containing the same species. CFU measures viable organisms under the test conditions; the label should clarify the timing of that count and storage instructions.[10]
How this relates to OYAHThe public ingredient list does not provide strain codes. A precise trial-to-product match therefore requires more formula documentation. We do not assign results from unrelated strains to this formula.
Evening wind-down
Sleep & Restore
A sleep formula deserves ingredient-level context.
The current ingredient list includes melatonin, valerian, chamomile, GABA, L-tryptophan, lemon balm, and passion flower. Dose and timing affect the relevance of sleep research.
- Ingredient focus
- Melatonin
- Foundational review
- 19 studies · 1,683 participants
- Evidence scope
- Ingredient, not full formula
Study findings & product relevance
A 2013 meta-analysis found small average improvements in sleep onset, total sleep time, and sleep quality with melatonin. Its trials involved primary sleep disorders and different protocols. Those findings do not establish the effect of OYAH’s multi-ingredient formula or apply equally to every sleep concern.[11]
How this relates to OYAHCompare the exact melatonin amount and directions on the current label. Combining ingredients does not, by itself, demonstrate an added or faster effect.
Cellular nutrition
NAD+
Similar names can refer to different ingredients.
The current OYAH page lists NAD+, quercetin, and resveratrol. NAD+, nicotinamide riboside (NR), and nicotinamide mononucleotide (NMN) are distinct compounds.
- OYAH ingredient
- NAD+
- Related research
- NR and NMN are different
- Evidence boundary
- No longevity claim
Study findings & product relevance
A 2018 Nature Communications trial examined nicotinamide riboside, a precursor of NAD+, at 500 mg twice daily over six weeks in middle-aged and older adults. It reported increased NAD+ metabolism. It did not test direct oral NAD+ or establish a longer lifespan.[12]
How this relates to OYAHThat frequently cited NR paper is useful background on the field. It does not substantiate the same absorption, biomarker changes, or benefits for OYAH’s NAD+ formula.
Circulation & training
L-Citrulline & L-Arginine Stack
The nitric-oxide pathway is clear. Performance results vary.
The formula lists L-citrulline DL-malate, L-arginine HCl, and L-arginine alpha-ketoglutarate. Form, amount, timing, and training protocol affect how closely a study applies.
- Pathway
- Arginine → nitric oxide
- Research focus
- Blood flow & exercise performance
- Evidence status
- Mixed across outcomes
Study findings & product relevance
L-citrulline can raise circulating L-arginine, which supplies the nitric-oxide pathway. Reviews report inconsistent acute effects on vasodilation and exercise tolerance, while some longer protocols report changes in blood flow or selected performance outcomes. A 2020 meta-analysis of citrulline and citrulline-malate studies found that results varied with exercise type, dose, and protocol.[13]
How this relates to OYAHThe OYAH product combines multiple forms, while many trials study a single ingredient or a specific amount of citrulline malate. Without an exact dose-and-form match, these papers explain the pathway and research field but do not predict your workout response or prove the finished stack.
Calm attention
Cognitive Relax Strips
Calm support in a portable format.
The listed formula provides 50 mg L-theanine, 25 mg GABA and 6 mg vitamin B6 per strip. Oral-strip convenience does not establish faster absorption or a stronger cognitive effect.
Study findings & product relevance
L-theanine studies use different amounts and endpoints. Oral GABA research remains limited; neither ingredient proves that this complete strip treats anxiety or improves cognition. Review sedating medicines and overlapping calming products. [14] [15]
Read the ingredient contextOpen the related guide ↗
Alertness & attention
Energy Strips
Match stimulant use to your day.
The current ingredient list includes caffeine, L-theanine and methylcobalamin (vitamin B12). Check the package for caffeine amount and count caffeine from every source.
Study findings & product relevance
Studies of caffeine and L-theanine inform selected attention outcomes. They do not establish a crash-free effect, immediate mouth absorption, all-day energy or the performance of this complete strip. Vitamin B12 does not provide a stimulant effect. [5] [14]
Read the ingredient contextOpen the related guide ↗
Sleep timing & evening routine
Sleep Strips
The format changes convenience, not the evidence.
The current ingredient list names valerian, lavender, chamomile, hibiscus and melatonin. Follow the product label and avoid combining sleep products.
Study findings & product relevance
Melatonin trials examine defined amounts, populations and timing. A strip with several botanicals is a different preparation. Existing ingredient research does not prove better sleep, freedom from next-day drowsiness or long-term safety for this finished product. [11]
Read the ingredient contextOpen the related guide ↗
Microbiome & digestive context
Probiotic + Metabolism Strips
The exact organism matters.
The product description lists Bifidobacterium lactis at 10 billion CFU and polydextrose at 50 mg per strip. Species identification alone does not identify the trial strain or confirm a count through expiry.
Study findings & product relevance
Probiotic results depend on the tested strain, amount, condition and viable count. The product name does not demonstrate weight loss or a metabolic benefit. A small polydextrose amount should not be equated with gram-level fibre interventions. [10]
Read the ingredient contextOpen the related guide ↗
Nutrient sufficiency
Iron Strips
Check iron need before supplementing.
The current product lists 19 mg iron as ferric saccharate and 400 µg folate per strip. Iron supports normal oxygen transport; fatigue alone does not identify iron deficiency.
Study findings & product relevance
Iron status requires appropriate assessment. Research in iron-deficient groups does not establish a benefit for iron-replete adults or for this strip formulation. Excess iron can cause harm. Keep iron-containing products away from children and review medicine interactions with a pharmacist. [16]
Read the ingredient contextOpen the related guide ↗
Why some studies are older: publication date is one part of relevance. We include recent research alongside foundational human trials and explain differences in dose, ingredient form, population, and measured outcome. A journal’s reputation alone does not establish a product’s benefit.
FORMULATION / WHAT CHANGES THE PICTUREIt’s all in
It’s all in
the details.
Two products can list a similar ingredient and still differ in meaningful ways. These three details help you make a more useful comparison.
1
The exact form
A mineral compound, botanical extract, probiotic strain, or nutrient precursor identifies what you are comparing. Magnesium glycinate is a specific form; a botanical extract also needs its preparation and standardization details.
2
The amount per serving
Compare the same units and serving basis. For magnesium, look at elemental magnesium. For a botanical, look at the extract amount and active-marker specification. For probiotics, look at viable count and strain information.
3
The evidence for delivery
Absorption claims need measurements on the relevant ingredient form and delivery system. A capsule, powder, or oral strip format alone does not establish superior absorption or a faster benefit.
TRANSPARENCY / KNOW WHAT EACH DOCUMENT TELLS YOUDifferent evidence.
Different evidence.
Different questions.
Use the right document for the question you are asking.
| DOCUMENT | WHAT YOU CAN LEARN | WHAT ELSE TO CHECK |
|---|---|---|
| Product label | Listed ingredients, serving amounts, directions, allergens, and cautions. | The current formula and the serving size on your bottle. |
| Certificate of analysis | The tests, specifications, and reported results for the identified sample or lot. | Product match, test scope, date, methods, and report issuer. |
| Manufacturing certificate | The facility, standard, audit scope, and validity period shown on the certificate. | That the facility makes your product and the certification remains current. |
| Ingredient study | Results for a defined ingredient, dose, population, and study period. | How closely those details match the product and your use. |
| Finished-product trial | Clinical findings for the complete formula tested. | The exact formulation, study quality, meaningful outcomes, and independent replication. |
HOW WE REVIEW THE SCIENCE
Evidence, with its limits left in.
This is a curated evidence review, not a formal systematic review. We use direct publication links and show where the study differs from the product.
1. Start with human evidence
Systematic reviews, meta-analyses, and randomized trials receive priority. Authoritative government guidance is used for topics such as probiotic strain specificity.
2. Match the exact intervention
We compare ingredient form, dose, preparation, delivery method, population, study duration, and measured outcome with the current OYAH formula.
3. Report meaningful limits
Small samples, self-reported outcomes, borderline results, short follow-up, commercial affiliations, and a mismatch with the OYAH product are stated where relevant.
4. Separate evidence types
An ingredient study is not a finished-product trial. A COA documents the tests listed for a sample or lot; it does not establish clinical benefit.
Last reviewed: 28 September 2026Linked ingredient research and clinical guidanceDirect PMID, PMCID or DOI identifiersNo OYAH finished-product trials claimed
OYAH HEALTH SCIENCE & QUALITY / EVIDENCE LIBRARY
Research by product.
Read selected human research relevant to the main ingredients in 15 OYAH formulas. We prioritize systematic reviews, meta-analyses, and randomized trials, then explain where the studied ingredient, form, dose, population, or outcome differs from the product.
Cognitive Performance
This multi-ingredient formula requires ingredient-by-ingredient reading. Acute caffeine–L-theanine findings do not establish long-term memory benefits.
- L-theanine with caffeine and attention switching ↗2008 · randomized crossover trial · PMID 18681988
- L-theanine with caffeine during a demanding attention task ↗2010 · randomized controlled trial · PMID 21040626
- Theanine, caffeine, cognition, and mood ↗2008 · double-blind placebo-controlled trial · PMID 18006208
- Ingredients marketed for cognitive performance ↗2021 · systematic review · PMID 34370563
Creatine Monohydrate
Cognition, memory, brain energetics, sleep deprivation, healthy ageing, and physical performance. These papers concern creatine supplementation, not an OYAH finished-product trial.
- Creatine supplementation and cognitive function in adults ↗2024 · systematic review and meta-analysis · PMID 39070254
- Methodological commentary on the 2024 cognition meta-analysis ↗2026 · commentary and evidence-quality caution
- Creatine and brain function ↗2022 · narrative review of cognition, mood, and neurological research · PMID 35267907
- Creatine and cognition in ageing ↗2025 · systematic review · PMID 40971619
GLP-1 Support
This dietary supplement is not a GLP-1 medicine or a substitute for prescribed treatment. Nutrition advisories discuss dietary assessment, protein, micronutrient needs and clinical follow-up; they did not test OYAH. We do not claim this formula raises GLP-1, causes weight loss or prevents medication side effects. If you use GLP-1 medication, ask your prescriber or pharmacist to review the complete label.
- Nutritional priorities during GLP-1 therapy2025 joint advisory · PMID 40450457 · Not an OYAH product trial.
- NIH ODS: IronGovernment guidance on assessment, intake and safety.
- NIH ODS: Vitamin B6Government guidance on intake and safety.
Magnesium Glycinate
The bisglycinate trial offers the closest form match. Broader magnesium reviews add context but do not show that every form works the same way.
- Magnesium bisglycinate in adults reporting poor sleep ↗2025 · randomized placebo-controlled trial · PMID 40918053
- Magnesium and sleep health ↗2023 · systematic review · PMID 35184264
- Oral magnesium for insomnia in older adults ↗2021 · systematic review and meta-analysis · PMID 33865376
- Magnesium supplementation, anxiety, and stress ↗2017 · systematic review · PMID 28445426
Bye Stress
Ashwagandha trials use different extracts, withanolide specifications, and doses. Those details matter when comparing a paper with Bye Stress.
- Ashwagandha for stress and anxiety ↗2024 · systematic review and meta-analysis · PMID 39348746
- Ashwagandha and stress or anxiety outcomes ↗2022 · dose-response meta-analysis · PMID 36017529
- Ashwagandha extract in adults experiencing stress ↗2019 · randomized double-blind trial · PMID 31517876
- Ashwagandha root extract for stress and anxiety ↗2012 · randomized double-blind trial · PMID 23439798
Colostrum
Human research focuses mainly on intestinal permeability and exercise settings. Processing, IgG specification, dose, and study population differ.
- Bovine colostrum and increased intestinal permeability ↗2024 · meta-analysis of randomized trials · PMID 38361147
- Bovine colostrum and gut permeability in athletes ↗2022 · systematic review · PMID 35745242
- Bovine colostrum and intestinal permeability in athletes ↗2017 · placebo-controlled trial · PMID 28397754
- Bovine colostrum during exercise in the heat ↗2014 · placebo-controlled double-blind study · PMID 25068884
Probiotic 20 Billion
Probiotic evidence is strain- and condition-specific. Species names and a total CFU count cannot identify a clinically studied strain.
- Single-strain versus multi-strain probiotics ↗2021 · systematic review · PMID 32274669
- Probiotics, prebiotics, and synbiotics for IBS ↗2020 · systematic review and meta-analysis · PMID 32190365
- Probiotics and gastrointestinal infection risk in adults ↗2023 · systematic review and meta-analysis · PMID 36822240
- Probiotics: strain, viable count, and evidence ↗NIH Office of Dietary Supplements · professional fact sheet
Sleep & Restore
The formula contains ingredients with separate research histories. Evidence for melatonin or one herb does not prove an added effect from the combination.
- Melatonin for primary sleep disorders ↗2013 · systematic review and meta-analysis · PMID 23691095
- Herbal medicines for insomnia ↗2015 · systematic review and meta-analysis · PMID 25644982
- GABA-modulating herbal medicines ↗2018 · systematic review · PMID 29168225
- Ashwagandha extract and sleep outcomes ↗2021 · systematic review and meta-analysis · PMID 34559859
NAD+
NAD+, NADH, NR, and NMN are different molecules. Research on a precursor cannot prove equivalent absorption or outcomes for direct oral NAD+.
- NAD+ and NADH supplements in humans ↗2024 · systematic review · PMID 37971292
- Nicotinamide riboside and NAD+ metabolism ↗2018 · randomized crossover trial · PMID 29599478
- Nicotinamide mononucleotide efficacy and safety ↗2023 · systematic review and meta-analysis · PMID 36482258
- NMN dose and blood NAD concentration ↗2024 · randomized multicentre trial · PMID 38430946
L-Citrulline & L-Arginine Stack
Citrulline can increase arginine availability, but circulation and exercise outcomes vary across form, amount, timing, population, and test protocol.
- Citrulline and exercise performance ↗2020 · review of the current literature · PMID 31977835
- Citrulline, watermelon, vascular function, and performance ↗2017 · review · PMID 27749691
- L-citrulline and blood pressure ↗2019 · systematic review and meta-analysis · PMID 30788274
- L-citrulline and blood pressure: a differing analysis ↗2018 · systematic review and meta-analysis · PMID 30284051
Cognitive Relax Strips
L-theanine studies use different amounts and endpoints. Oral GABA research remains limited; neither ingredient proves that this complete strip treats anxiety or improves cognition. Review sedating medicines and overlapping calming products.
- Tea compounds, cognition, sleep and mood2025 systematic review and meta-analysis of randomized trials · PMID 40314930 ↗
- L-theanine and cognitive performance2025 systematic review and meta-analysis · PMID 41227106 ↗
- Acute effects of tea constituents2014 systematic review and meta-analysis · PMID 24946991 ↗
- Oral GABA, stress and sleepHepsomali et al., 2020 · Systematic review · PMID 33041752 ↗
Energy Strips
Studies of caffeine and L-theanine inform selected attention outcomes. They do not establish a crash-free effect, immediate mouth absorption, all-day energy or the performance of this complete strip. Vitamin B12 does not provide a stimulant effect.
- Acute caffeine and attention2025 systematic review and meta-analysis · PMID 40335666 ↗
- Cognitive, physical and occupational performance2016 evidence review · PMID 27612937 ↗
- Caffeine after sleep loss2020 systematic review and meta-analysis · PMID 31837359 ↗
- Caffeine with L-theanine2025 systematic review and meta-analysis · PMID 40314930 ↗
Sleep Strips
Melatonin trials examine defined amounts, populations and timing. A strip with several botanicals is a different preparation. Existing ingredient research does not prove better sleep, freedom from next-day drowsiness or long-term safety for this finished product.
- Melatonin and primary sleep disorders2013 meta-analysis · PMID 23691095 ↗
- Melatonin supplementation and sleep quality2021 systematic review and meta-analysis · PMID 33417003 ↗
- Timing and amount of melatonin2024 systematic review and dose-response meta-analysis · PMID 38888087 ↗
- NCCIH: Melatonin—what you need to knowGovernment safety and interaction guidance ↗
Probiotic + Metabolism Strips
Probiotic results depend on the tested strain, amount, condition and viable count. The product name does not demonstrate weight loss or a metabolic benefit. A small polydextrose amount should not be equated with gram-level fibre interventions.
- NIH ODS: ProbioticsGovernment guidance on strains, CFU, uses and safety ↗
- Single-strain versus multi-strain probiotics2021 systematic review · PMID 32274669 ↗
- Probiotics, prebiotics and synbiotics for IBS2020 systematic review and meta-analysis · PMID 32190365 ↗
- Probiotics and gastrointestinal infection risk2023 systematic review and meta-analysis · PMID 36822240 ↗
Iron Strips
Iron status requires appropriate assessment. Research in iron-deficient groups does not establish a benefit for iron-replete adults or for this strip formulation. Excess iron can cause harm. Keep iron-containing products away from children and review medicine interactions with a pharmacist.
- NIH ODS: IronGovernment deficiency, intake and safety guidance ↗
- Iron and cognitive outcomes2025 systematic review and meta-analysis · PMID 40945632 ↗
- Iron deficiency, cognition and fatigue in womenSystematic review · PMID 25191562 ↗
- Iron and physical performance in womenSystematic review and meta-analysis · PMID 24717371 ↗
How to read this library: A linked paper supports only the ingredient, preparation, dose, population, study duration, and outcome that researchers tested. It does not make every result transferable to an OYAH formula. “Systematic review” and “meta-analysis” describe the research method; they do not mean every included study was high quality or that the result applies to every person. Product pages and labels can change, so compare each paper with the current Supplement Facts panel.
READ THE CORE SOURCES
Follow the evidence.
Core publications cited in the explanations above, plus manufacturing guidance. Research review date: 28 September 2026. Each link opens the publication or its indexed record.
- 01How FDA regulates dietary supplements ↗U.S. Food and Drug Administration · Questions and Answers on Dietary Supplements · official consumer guidance
- 02Creatine supplementation and cognitive function in adults ↗Xu et al. · Frontiers in Nutrition · 2024 · systematic review and meta-analysis · PMID 39070254 · DOI 10.3389/fnut.2024.1424972
- 03Methodological commentary on the 2024 creatine cognition meta-analysis ↗Citherlet · Frontiers in Nutrition · 2026 · commentary · DOI 10.3389/fnut.2026.1716285
- 04Magnesium bisglycinate in adults reporting poor sleep ↗Schuster et al. · Nature and Science of Sleep · 2025 · randomized placebo-controlled trial · PMID 40918053 · DOI 10.2147/NSS.S524348
- 05Caffeine with L-theanine and selected cognitive tasks ↗Owen et al. · Nutritional Neuroscience · 2008 · randomized crossover trial · PMID 18681988
- 06Bacopa extract, cognition, stress, and fatigue ↗Lopresti & Smith · Clinical Drug Investigation · 2025 · randomized placebo-controlled trial · PMID 41091332
- 07A proprietary ashwagandha preparation and stress ↗Mahadevan et al. · Advances in Therapy · 2025 · randomized placebo-controlled trial · PMID 40875185
- 08Bovine colostrum and intestinal permeability ↗Digestive Diseases and Sciences · 2024 · meta-analysis of randomized trials · PMID 38361147
- 09Bovine colostrum and gut barrier measurements in athletes ↗Hałasa et al. · Nutrients · 2017 · small placebo-controlled trial · DOI 10.3390/nu9040370
- 10Probiotics: species, strains, and evidence ↗NIH Office of Dietary Supplements · health professional fact sheet
- 11Melatonin and primary sleep disorders ↗Ferracioli-Oda et al. · PLOS ONE · 2013 · meta-analysis · PMID 23691095 · DOI 10.1371/journal.pone.0063773
- 12Nicotinamide riboside and NAD+ metabolism ↗Martens et al. · Nature Communications · 2018 · randomized crossover trial · PMID 29599478 · DOI 10.1038/s41467-018-03421-7
- 13Citrulline supplementation and exercise performance ↗Gonzalez et al. · Journal of Strength and Conditioning Research · 2020 · review of the current literature · PMID 31977835
- 14L-theanine with caffeine: cognitive research ↗2025 systematic review and meta-analysis · PMID 40314930 · See the ingredient guide for additional studies.
- 15Oral GABA, stress and sleep ↗Hepsomali et al. · 2020 systematic review · PMID 33041752
- 16Iron: needs, assessment and safety ↗NIH Office of Dietary Supplements · Clinical guidance; not an OYAH product trial.
- 17Nutritional priorities during GLP-1 therapy ↗2025 joint advisory · American Journal of Clinical Nutrition · PMID 40450457 · Nutrition guidance; not evidence for OYAH GLP-1 Support.
- 18Vitamin B6: intake and safety ↗NIH Office of Dietary Supplements · Review total supplemental intake.
YOUR QUESTIONS, ANSWEREDLet’s make
Let’s make
the details clear.
Have a question about a formula or report? Contact hello@oyahhealth.com with the product name and, if available, your lot number.
Are OYAH products clinically proven?
The studies linked here examine ingredients or other manufacturers’ preparations. They do not establish clinical results for OYAH’s finished formulas. We identify the study type and product relevance so you can see exactly what each source supports.
Are OYAH supplements FDA approved?
No. The FDA does not approve dietary supplements for safety and effectiveness before they are marketed. This applies to the dietary-supplement category, not only to OYAH. The FDA regulates supplements, requires applicable labeling and manufacturing compliance, inspects facilities, monitors adverse-event reports and the marketplace, and can act against adulterated or misbranded products. FDA registration does not mean product approval or endorsement. See source 1 for the FDA’s explanation.
Do you have a certificate for every product?
We have certificates of analysis for our products. Use the request tool above to ask for the report relevant to your formula and lot. A report for a different formula or batch may not answer the question about your bottle.
Does every certificate show the same tests?
No. The report itself lists the tests it covers. Review the actual test entries rather than assuming that potency, microbes, heavy metals, allergens, and stability all appear on every COA.
Does a COA mean an independent laboratory tested the product?
A COA alone does not establish independent laboratory testing. Check the issuing organization and laboratory details, and request the underlying laboratory report if you need to confirm who performed a specific test.
Can I compare results across different ingredient forms?
Only when the evidence supports that comparison. A specific Bacopa or ashwagandha extract may differ from another preparation. Probiotic strain codes matter. Research on NR cannot automatically support a direct NAD+ product.
Can I take several OYAH products together?
Check the complete labels for overlapping ingredients and total daily intake, including caffeine or ingredients used for sleep. Follow each product’s cautions and ask your healthcare professional about combinations if you use medication, have a health condition, are pregnant, or are breastfeeding.
Do oral strips automatically absorb better than capsules?
The format alone cannot establish that. A claim about improved absorption or faster effects needs relevant testing of the ingredient and delivery system. Compare the exact formula, dose, and study before relying on an absorption claim.
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Explore OYAH formulas, read the ingredients, and choose the products that fit your goals.