OYAH INGREDIENT LIBRARY

Iron

Iron is essential, but supplementation should follow a real need. Deficiency can impair energy and concentration; excess iron also carries risk.

Evidence reviewUpdated 11 October 2026
IEssential mineral / oxygen transport
Evidence signalUseful for deficiency; inappropriate routine use can harm
Research focusIron status, fatigue, cognition and performance
Key qualifierFerritin, hemoglobin, cause and clinical context

What it is

Iron supports hemoglobin, oxygen transport and many enzymes. Iron deficiency can exist with or without anemia, but fatigue alone cannot diagnose it.

What human research suggests

Supplementation can improve physical performance or selected cognitive and fatigue outcomes in iron-deficient groups. It is not a general energy product for people with adequate iron. Testing and the cause of low iron matter, especially with heavy menstrual bleeding or gastrointestinal symptoms.

HOW THIS RELATES TO OYAH

Iron in an OYAH formula.

The related product page shows the current ingredient list and directions. Compare those details with each paper before deciding how closely the evidence applies. OYAH does not claim that the finished formula was tested in the linked studies.

Iron StripsView Iron Strips
Ingredient studyTests a defined ingredient, preparation and protocol.Finished-product evidenceWould require a clinical trial of the complete formula.Certificate of AnalysisReports the tests shown for a sample or lot; it does not establish benefit.
SAFETY & CONTEXT

What to consider before use.

Iron commonly causes nausea, constipation and abdominal pain. Overdose can be fatal to children, so secure storage matters. Iron overload, hemochromatosis and unnecessary high intake can damage organs. It also interacts with levothyroxine, some antibiotics and other minerals.

This guide is educational and is not medical advice. Speak with a qualified healthcare professional about pregnancy, breastfeeding, medical conditions, medicines, surgery or persistent symptoms.

READ THE SOURCES

Follow the evidence.

Each link opens the publication, indexed record or government guidance. Study findings remain limited to the preparation and protocol researchers examined.

  1. NIH ODS: IronGovernment deficiency, intake and safety guidance ↗
  2. Iron and cognitive outcomes2025 systematic review and meta-analysis · PMID 40945632 ↗
  3. Iron deficiency, cognition and fatigue in womenSystematic review · PMID 25191562 ↗
  4. Iron and physical performance in womenSystematic review and meta-analysis · PMID 24717371 ↗
Current product directory

Know the product. Read the evidence.

Compare the current OYAH range, then open the product-specific evidence and ingredient guides. Ingredient studies do not establish the benefits of a finished OYAH formula.