ingestible · for hair loss & thinning
Iron and Ferritin Correction
Reviewed by the Nimbera editorial team · Last updated May 2026
How to use
Get a blood test for serum ferritin (not just hemoglobin) before supplementing. If ferritin is below 40-70 ng/mL, take iron bisglycinate 25-36 mg daily on an empty stomach with vitamin C (500 mg) to enhance absorption. Retest after 3 months. Food sources: red meat, lentils, pumpkin seeds, spinach with lemon.
How it works
Ferritin (stored iron) is required for ribonucleotide reductase, an enzyme essential for DNA synthesis and rapid cell division in hair follicle matrix cells. Deficiency shifts follicles into telogen (resting phase) prematurely, causing diffuse shedding.
Where to buy
Iron bisglycinate (gentler on stomach than ferrous sulfate) available at pharmacies, health stores, Amazon. Brands: Thorne, Pure Encapsulations, Garden of Life.
Typical cost: $10-20/month
Safety notes
Do not supplement without confirmed deficiency - iron overload is dangerous. Keep iron supplements away from children (leading cause of pediatric poisoning). Iron bisglycinate preferred to reduce constipation and GI upset. Can interact with thyroid medication (take 4 hours apart) and some antibiotics.
Drug & supplement interactions
- Always tell your doctor or pharmacist about any supplements you take.
- Interactions can occur with prescription medications, blood thinners, and immunosuppressants.
- Herbal remedies can affect how the body absorbs or metabolises drugs.
- Check drugs.com interactions checker before starting.
Clinical source
PubMed - Trost et al. 2006 (J Invest Dermatol)This information is compiled from primary clinical literature and is for informational purposes only. It is not a substitute for professional medical advice. Read our full disclaimer.