mineral · a form of Iron
Iron
Iron chelated with two glycine molecules (Ferrochel). The gentlest and most bioavailable supplemental iron form, causing significantly less GI distress than ferrous sulfate. Essential for oxygen transport and energy.
What it’s good for
Iron for Chronic Fatigue
Solid2 studies · 2 supporting · 0 against
9 safety notes
Iron carries oxygen round your body. Low iron is the most common fixable cause of tiredness.
Dose: 18–36 mg
Tested as: Iron (Ferrous Sulfate)
Iron for Low Stamina
Not verified3 studies · 3 supporting · 0 against
10 safety notes
Why it gets suggested: Iron carries oxygen to muscle. Even mildly low iron cuts what you can do.
Dose: 18–36 mg
Tested as: Ferrous Sulfate
Why we could not verify it: A proper search found trials of this compound, but not in the form named here — Ferrous Sulfate. Evidence for one form is not evidence for another.
Iron for Brittle Nails
Not verified3 studies · 0 supporting · 0 against
9 safety notes
Why it gets suggested: Nail cells need oxygen to grow, and low iron starves them of it.
Dose: 18–36 mg
Why we could not verify it: PubMed returns zero results for iron bisglycinate combined with nails. The 74-paper iron bisglycinate literature in humans covers exclusively anemia, iron status in pregnancy, and gastrointestinal tolerability. The 2024 Karger nail supplements review (already in the known papers) explicitly enumerates the four compounds with nail-specific evidence and does not include iron. No RCT of any iron form — including ferrous sulfate — was found that used brittle nails or nail quality as a primary outcome. Iron deficiency is associated with nail changes (koilonychia) in case literature, but that association has not been tested in an interventional trial.
Iron for Hair Thinning
Not verified2 studies · 0 supporting · 0 against
10 safety notes
Why it gets suggested: Hair follicles are among the fastest-dividing cells you have, and they need iron.
Dose: 18–36 mg
Tested as: Ferrous Sulfate and unspecified iron salts
Why we could not verify it: A proper search found trials of this compound, but not in the form named here — Ferrous Sulfate and unspecified iron salts. Evidence for one form is not evidence for another.