What Is Iron Bisglycinate?

Iron Bisglycinate by Thorne delivers iron in the chelated bisglycinate form, which is significantly better absorbed than ferrous sulfate and notably gentler on the gastrointestinal tract, making it the preferred form for individuals who have experienced constipation, nausea, or stomach upset with standard iron supplements.

Key Benefits

Provides highly bioavailable chelated iron for efficient absorption
Supports healthy hemoglobin production and red blood cell formation
Promotes healthy iron stores and oxygen-carrying capacity
Significantly gentler on the digestive tract than ferrous sulfate iron
Supports energy levels and reduces fatigue associated with low iron

Who Should Take This?

Ideal for women of reproductive age with menstrual blood loss, pregnant or postpartum women, vegetarians and vegans with limited dietary heme iron, athletes, and anyone with iron deficiency who has had difficulty tolerating conventional iron supplements.

How to Use

Take 1 capsule daily on an empty stomach, or with a small amount of food if GI sensitivity occurs. Taking with vitamin C increases absorption. Avoid taking with calcium, dairy, coffee, or tea, which reduce iron absorption. Recheck iron and ferritin levels after 8-12 weeks.

Our Doctors’ Take

Our doctors use Iron Bisglycinate specifically because of its tolerability advantage. Iron deficiency is extremely common and many patients have abandoned iron supplementation due to digestive side effects from inferior forms. Thorne’s bisglycinate chelate changes that equation, and we use it as our default iron recommendation for virtually all patients who need iron support.

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.