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Thorne Iron Bisglycinate

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What we think

Here is where the fun begins! Maintaining adequate iron levels is like blood-doping without blood-doping. Athletes (especially endurance athletes; aka YOU) are often diagnosed with “sports anemia” due to their decreased hematocrit levels resulting from intensive training programs.

Average adults require a minimum of 8mg per day of iron, while athletes need about 1.5 times that! Iron is essential for the production of red blood cells. Red blood cells carry oxygen to the muscles and dispose of carbon dioxide through the lungs, basically regulating your work capacity and ability to perform aerobic exercise. Iron crucial when it comes to maximizing your training and performing at your highest potential.

Thorne has created a chelate form of iron, reacted with glycine, to optimize absorption and eliminate the GI side effects that accompany most traditional iron supplements. 


Take 1 capsule daily or as recommended by your performance professional.

What's Inside

Nutrition Facts For Thorne Iron Bisglycinate
(60 Capsules)

Serving Size: 1 Capsule
Servings Per Container: 60

Amount Per Serving
% Daily Value*

*Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.
Ingredients for Thorne Iron Bisglycinate (60 Capsules): One Capsule Contains: Iron (as Ferrochel® Ferrous Bisglycinate Chelate)† 25 mg. Other Ingredients: Hypromellose (derived from cellulose) capsule, Microcrystalline Cellulose, Leucine, Silicon Dioxide.

Questions & Answers

Reviews for Thorne Iron Bisglycinate

Customer Reviews
4.5 Based on 68 Reviews
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Laurelia B.
I recommend this product
Five Stars

Excellent product and good price

Sasha W.

I was extremely anemic- cell size and volume was very low. My bloodwork after just two months was completely back in normal ranges. I'm not fatigued any more, it doesn't upset my stomach and can take on an empty stomach, and I don't have black stool like when I was taking the slow FE. Great product!

Issac U.

Thorne is the best brand in every category. This one is great and I have no problems with my stomach wich other iron caps give me.

Fred U.

After fighting anemia for years due to malabsorption syndrome, including several admissions to the hospital for iron infusions, a naturopath suggested I try Thorne's Iron Bisglycinate. I was skeptical, since iron supplements have done nothing for me in the past, but after taking three a day for 90 days my iron and ferritin levels were actually out of the low zone for the first time in a longgggg time. Even my GI doc was impressed. Currently I'm taking four a day (two morning, two night) and have had no ill side effects from them. I love them so much I put them on auto-delivery!

Jennifer E.

It doesn't upset your stomach, cause constipation & the cost is reasonable!

Diana N.

I take multiple supplements and I have found Thorne Research products work best for me. These were recommended to me by my Functional Medicine doctor and I've been taking them for over a year. After some research trying to save a buck or two, I realized that these are the best for my tummy; they do not cause any upset, they do not leave an aftertaste nor do they cause bloat or gas. Happy with this purchase and this brand.

Branden R.

Love this iron! Significantly raised my HGB and ferritin levels as I was severely anemic. Non-constipating too.

Anton U.

I have a great deal of trouble with iron- can't absorb it. This brand was recommended by my integrative doctor. she also recommended taking it late at night when the stomach is somewhat empty, and taking vitamin c with it to help absorb it. Blood work shows it works better than all the other brands I have tried over the years.