Ferrous/Iron Bisglycinate Chelate
Ferrous/Iron Bisglycinate Chelate is a tier 1 form of Iron, used in 293 on-market products and providing 27.4% elemental iron by weight.
293
on-market products
tier 1
quality tier
27.4%
elemental fraction
Basis: Fe(C2H4NO2)2, anhydrous bisglycinate (theoretical pure-compound value; branded Ferrochel is standardized to ~20% Fe, likely a diluted/standardized powder rather than pure chelate)
Why this tier: Apparent bioavailability 90.9% vs. 26.7% for ferrous sulfate in a 40-child matched-group trial of iron-deficiency anemia (not stated as randomized); only the chelate group showed a significant ferritin increase.
Source: Pineda O, Ashmead HD. 2001, Nutrition 17(5):381-384, PMID 11377130