THORNE - Iron Bisglycinate - 25 mg Iron Supplement for Enhanced Absorption Without Gastrointestinal Side Effects* - NSF Certified for Sport - Gluten-Free - 60 Servings Review
Our verdict
A straightforward 25 mg iron bisglycinate capsule from a brand known for third-party testing, aimed at people who want a chelated iron form without extra additives.
Check price on AmazonBest for
Shoppers who want a single-ingredient, NSF Certified for Sport iron supplement in a well-known chelated form.
Skip if
You want a blended formula with added botanicals or vitamins, or you prefer a liquid or gummy delivery.
- Form Capsules
- Count 60 Count
- Flavor Unflavored
- Type Iron
- Diet Vegetarian
- Benefits Sports Performance
Pros
- 25 mg of iron in the bisglycinate, or chelated, form per serving
- NSF Certified for Sport, useful for athletes subject to drug testing
- Dairy free, gluten free and soy free
- From a brand with a longstanding reputation for third-party testing
Cons
- Capsule only, no liquid or gummy option
- No added vitamins or botanicals for those who want a fuller blend
- Higher price point than basic drugstore iron tablets
Our scorecard
-
Owner rating4.7/5
4.7 average across 8,388 owner ratings
-
Popularity4.2/5
8,388 owner reviews, more than most models here
The overall score is owner satisfaction weighted by how many reviews back it, so a high rating from few reviews counts for less. The bars below show where this model stands against the other home health monitors: bathroom scales, blood pressure monitors, pregnancy and ovulation tests, thermometers, body composition monitors, stethoscopes, glucose monitors and pulse oximeters we track in this category on price, popularity and size. Context, not marks against it, and our read of the data, not a lab test.
Overview
['THORNE Iron Bisglycinate is a 60 serving capsule supplement built around 25 mg of iron in the bisglycinate, or chelated, form. The maker markets this form as designed for enhanced absorption without the gastrointestinal side effects some people report with other iron types.', 'The product carries NSF Certified for Sport status, meaning it has been screened for banned substances, which matters to athletes who face testing. It is also labeled gluten free, dairy free and soy free, keeping the formula free of common allergens.', 'This is a single-ingredient iron product rather than a blend, so shoppers looking for a plain, well-documented iron form without added herbs or vitamins have a clear option here.']
Specifications
| Form | Capsules |
|---|---|
| Count | 60 Count |
| Flavor | Unflavored |
| Type | Iron |
| Diet | Vegetarian |
| Benefits | Sports Performance |
| Allergens | Dairy Free, Gluten Free, Soy Free |
Performance notes
Capsule format, 60 servings per bottle, unflavored, 25 mg iron bisglycinate per serving. Labeled vegetarian, dairy free, gluten free and soy free, and marketed around sports performance and NSF Certified for Sport status.
What buyers say
With a 4.7 average rating across more than 8,300 reviews and roughly 40,000 units bought in the past month, this is one of the more consistently well-reviewed and heavily purchased iron products in its category.
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Frequently asked questions
What does 'NSF Certified for Sport' mean?
It means the product has been tested by NSF to confirm it is free of banned substances, which is relevant for athletes subject to drug testing programs.
What is iron bisglycinate?
It is a chelated form of iron, meaning the mineral is bound to an amino acid. The maker markets this form as designed for enhanced absorption with fewer gastrointestinal side effects than some other iron types.
Is this vegetarian?
Yes, the capsule is labeled vegetarian as well as dairy free, gluten free and soy free.