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THORNE Iron Bisglycinate, 25 mg Iron Supplement, 60 Capsules

  • Based on 8,877 reviews
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Features

  • Well-Absorbed Iron: Provides 25 mg of elemental iron per capsule in a non-constipating, well-absorbed form as iron bisglycinate
  • Symptoms of Low Iron: Nearly 1 in 3 adults in the U.S. may have low iron levels, which can manifest as weakness, fatigue, shortness of breath, dizziness, drowsiness, irritability, infrequent menstruation, and more
  • Blood Support: Dietary iron is essential for the formation of new red blood cells, especially important for women of childbearing age, after blood loss from surgery/injury, or for those who follow vegan/vegetarian diets*
  • NSF Certified for Sport: Tested for compliance with label claims and to ensure the absence of nearly 300 substances banned by many major athletic organizations
  • Trusted: Thorne is trusted by 100+ professional sports teams and the #1 most recommended clinical brand by consumers and health-care practitioners (Based on a 2026 independent survey of US supplement consumers and health-care practitioners)

Description

Iron Bisglycinate NAC - 500mg Super EPA Vitamin D3 Supplement Basic Nutrients 2/Day Magnesium Glycinate Berberine What makes Thorne supplements high quality? Thorne produces high-quality supplements through rigorous testing, well-researched ingredient sourcing, and strict manufacturing standards. We avoid unnecessary additives, binders, and fillers that may interfere with nutrient absorption. How does Thorne test its supplements for quality? To confirm the purity of our ingredients, the potency of our formulas, and the absence of all contaminants, we carry out a minimum of four rounds of testing on every product we manufacture. 100+ Thorne employees are dedicated to ensuring quality. Are Thorne supplements clinically tested and safe? Thorne partners with researchers and conducts clinical trials to support the efficacy of our products. Our team of doctors and medical experts substantiate each ingredient in every formula based on extensive clinical research and medical literature. Why are Thorne products more expensive than other supplements? When it comes to the health of our customers, we never settle. Thorne products may be priced higher than some others because of our commitment to quality at every step. We don’t simply meet the standard in dietary supplements — we set the standard. Where are Thorne supplements made and where are the ingredients sourced from? Located in South Carolina, Thorne manufactures supplements in the USA using globally sourced ingredients. When it comes to ingredient sourcing, we seek out only the highest-quality ingredients, selecting each one for its purity and effectiveness.

Product Dimensions ‏ : ‎ 2.09 x 2.09 x 3.72 inches; 0.32 ounces


Item model number ‏ : ‎ M226


Date First Available ‏ : ‎ October 1, 2013


Manufacturer ‏ : ‎ Thorne Research


Best Sellers Rank: #374 in Health & Household (See Top 100 in Health & Household) #2 in Iron Mineral Supplements


#2 in Iron Mineral Supplements:


Customer Reviews: 4.7 4.7 out of 5 stars (8,877)


Item Form: capsules


Primary Supplement Type: Iron


Flavor: Unflavored


Product Benefits: Sports Performance


Diet Type: Vegetarian


Supplement Formulation: Individual Supplement


Unit Count: 60 Count


Number of Items: 1


Item Weight: 9.07 g


Brand Name: THORNE


Age Range Description: Adult


Manufacturer: Thorne Research


UPC: 693749003458


Model Number: M226


Manufacturer Part Number: M226-R


Material Type Free: no artificial flavors,soy free,gluten free,dairy free


Allergen Information: Dairy Free, Gluten Free, Soy Free


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Sep 19

This item is non-returnable:

Non-returnable due to Food safety reasons

View our full returns policy here.

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Top Amazon Reviews


  • Fixed my SEVERE iron deficiency!
I recently started seeing a functional medicine doctor to address some issues I've been having and the first they had me do was a full blood workup. When the results came back one of the most glaring issues was my blood iron (ferritin) level. Ideal levels for a woman my age should be 100-150+ ug/L. My level was 18!! The doctor asked me how I managed to get out of bed in the morning and how I can go up and down stairs without fainting, let alone live my life! It's amazing how you can get used to such a poor quality of life when it creeps up on you and you don't know any different. I immediately started taking iron at triple the recommended dose to make up for my severe deficiency and stop the 'iron leak' I seem to have in my body. After bouncing around between a few different supplements, I have settled on this one and I love it! I take 2 per day (that's what my doctor recommended even though the bottle says 1) and I no longer get dizzy and light headed, I don't bruise as easily as I used to and I just feel so much better over all! If you're deficient in iron, some of the symptoms you might experience are fatigue, dizziness, shortness of breath, difficulty concentrating, difficulty regulating body temperature or often feeling cold, pale skin, heart palpitations, shortness of breath, headaches, hair loss, restless leg syndrome, itchiness, more frequent bouts of illness and ringing, hissing or buzzing in your ears. My doctor says almost EVERYONE is deficient in iron, so this might be something you should take even if you're NOT experiencing these symptoms! One of the reasons I chose this particular brand is because it uses a chelate which is more highly absorbable by the body than cheaper carbonates, oxides, sulfates and phosphates and it doesn't have a bunch of crap additives in it. Additionally, the pills are TINY and super easy to swallow! I use some other Thorne supplements as well and really like them. That being said, not ALL of Thorne's stuff is the best of the best, but when it comes to my iron levels, this has worked wonders and I can definitely recommend! I sincerely hope this review has been helpful to someone else! And yes, I pay full price for this. I get it monthly in my subscribe and save. Feel free to ask any questions! ... show more
Reviewed in the United States on July 25, 2021 by Kelly

  • Super Effective!!!
I took this consistently every evening with a cup of orange juice for the past 2 1/2 months and my ferritin level jumped from 12 to 35!!! The capsules aren’t very big and are easy to swallow. No upset stomach. No constipation. I timed my doses so that I didn’t have any coffee or dairy an hour or two before or after since they interfere with absorption. Highly recommend!!! ... show more
Reviewed in the United States on August 7, 2026 by Amanda

  • worth buying
I originally chose THORNE’s iron supplement after doing quite a bit of research, especially because I was concerned about how iron supplements can affect digestion. I was looking for something that would be effective but also gentle and easy on the stomach. Honestly, I didn’t expect such a noticeable result. My iron level was very low — around 15 — and after taking this supplement consistently for approximately three months, along with eating more meat and other iron-rich foods, my level increased to around 40. I’m genuinely impressed with the results. I can proudly say that this supplement has worked really well for me, and I’m definitely going to continue purchasing it to maintain and further improve my iron levels. For anyone who is looking for an effective iron supplement that is also gentle on digestion, I would definitely recommend giving THORNE a try. ... show more
Reviewed in the United States on August 7, 2026 by Tatevik Poghosyan

  • Great way to increase your iron and energy!
Fantastic! I showed these to my Dietitian and she said they were perfect for me because they are bio available, so they wouldn’t be hard for my body to digest. I’m so glad I got them. After taking them for just a week I already noticed an increase in my energy!
Reviewed in the United States on August 25, 2026 by Cristie LG

  • Gentle on my stomach and made a noticeable difference
As a personal trainer and nutrition coach, I’m pretty intentional about the supplements I use and recommend. I started taking Thorne Iron Bisglycinate because my ferritin wasn’t technically out of range, but it was on the low end, and I wanted to support my iron levels without upsetting my gut. This has been one of my favorite forms of iron because it has been very easy on my stomach compared with the ferrous iron products I’ve tried. Since taking it consistently, I’ve noticed better energy, less hair shedding, and healthier hair growth. I also haven’t experienced the anxiety or other issues I was having before. I’ve recommended iron bisglycinate to clients who don’t tolerate traditional ferrous iron well, and several have told me they felt better and noticed improvements in their energy and ability to get through their workouts. A few have even mentioned improvements in libido. Obviously, everyone responds differently to supplements, but based on my own experience and the feedback I’ve received from clients, this is one I feel comfortable recommending when someone is looking for a gentler iron option ... show more
Reviewed in the United States on August 31, 2026 by RNN

  • honest review
It seems to be working well for me. I haven't had any blood work done to see that my iron level has gone up but I haven't felt tired and worn out since I started taking it. I also drink organic beet juice maybe once or twice a month.
Reviewed in the United States on August 17, 2026 by Karena Meeks

  • GI Friendly
I have a sensitive stomach. Most medications cause my stomach to feel unsettled or nauseous. During my research for an iron supplement I discovered Thorne. I have taken this supplement with a class of orange and little food in my stomach. I had a little GI upset, but after a few days I have no GI issues. I definitely recommend this supplement. ... show more
Reviewed in the United States on August 29, 2026 by Liz G

  • Incredibly effective, no GI side effects and unfortunately now owned by a huge multinational
Amazing supplement! My XC runner son improved his ferritin by 28 points in just 6 weeks with every other day supplementation of 50mg along with 500mg vitamin C. And zero GI issues! The only thing that makes me sad is Thorne’s recent acquisition by Proctor & Gamble. Oh well. Buy it now while you can still trust the quality!! ... show more
Reviewed in the United States on September 6, 2026 by SoCal Cal

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