Thorne iron 25mcg Review

The THORNE Iron Bisglycinate supplement stands out as a premium iron solution, meticulously formulated to deliver 25 mg of highly absorbable iron in each of its 60 capsules. This product is specifically engineered to provide enhanced absorption, a critical factor for individuals seeking to effectively raise or maintain their iron levels. A key benefit highlighted is its gentle nature on the digestive system, designed to minimize or eliminate the common gastrointestinal side effects, such as stomach upset and constipation, that frequently deter individuals from consistent iron supplementation. The iron is presented in a chelated bisglycinate form, which is known for its superior bioavailability and reduced likelihood of causing digestive discomfort compared to other iron types. Beyond its gentle efficacy, the THORNE Iron Bisglycinate is distinguished by its commitment to quality and purity. It is certified Gluten-Free, making it a safe option for those with gluten sensitivities or celiac disease. Furthermore, the supplement proudly carries the NSF Certified for Sport designation. This certification is a rigorous third-party verification process that ensures products are free from banned substances, contaminants, and that what's on the label is actually in the bottle. This makes it an ideal choice for athletes and active individuals who require assurance about the integrity of their supplements. The unflavored capsules are easy to swallow, contributing to a hassle-free daily regimen. Positioned for foundational health, this iron supplement supports vital bodily functions, including red blood cell production, oxygen transport, and energy metabolism. By providing a consistent and well-tolerated source of iron, it helps combat fatigue and supports overall vitality. The 25mg dose is carefully calibrated to offer effective support for individuals needing to supplement their iron intake. As an Amazon's Choice product, it reflects a strong market preference and positive customer experience, reinforcing its reputation as a reliable and effective iron supplement. This product is a testament to Thorne's dedication to producing high-quality, science-backed nutritional supplements that prioritize both efficacy and patient comfort. The focus on a gentle, non-irritating formula ensures that users can consistently take their iron without adverse reactions, leading to better long-term health outcomes and improved iron status.

Tier ⓘ
Members see this product's tier and why. Tiers run from 1, the strongest evidence, to 5. How we grade →
Evidence ⓘ
How strongly the evidence says this product works: human studies count most, then real reviews, then our biohacker panel.
Positive Reviews
Biohacker Mentions
Cost per month
$8

Study, Trial or Testing Result Summary

MembersHuman studies

11 of these 13 human studies gave iron by drip or injection, not by mouth.

This product gives 25 milligrams of iron a day as a gentle chelated form, which counts as a dose. The evidence for blood flow is , and of it comes from iron given into a vein, iron taken by mouth. …

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Review Totals and Summary

Members9,599 reviews
9,599 reviews · Amazon 9,000 · Thorne 290 · Walmart 277 · Target 32

Customers consistently the THORNE Iron Bisglycinate supplement for its notable effectiveness and of use, frequently reporting in their iron levels and a noticeable in energy, often felt as early as the day after starting supplementation. A predominant theme in the feedback centers on the product's excellent tolerability, with users highlighting the absence of common iron supplement side such as stomach upset or constipation. …

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Biohacker Summary

MembersWhat our biohacker panel says

The panel is split on iron, the main ingredient here, with seeing real value when levels are but urging care about too much. Another took 10 milligrams of heme iron, then stopped because form of iron his levels after years of trying. …

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RAL Summary

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More Details

MembersBody systems · Combine with · Possible side effects

Body systems: Cardiovascular system, Blood, Respiratory system. Combine with and possible side are for members.

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Supplement Facts

Iron † 25 mg
Supplement Facts
Serving Size One Capsule
Servings Per Container 60
Amount Per Serving% Daily Value
Iron (as Ferrochel® Ferrous Bisglycinate Chelate)†25 mg139%

Label source: the brand's label · Report a label change

Where to Buy

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Our articles on this subject

Graded October 23, 2026 by the Reverse Age Lab evidence engine, from human studies, real reviews and our biohacker panel. How we grade. Is this medical advice? No. Rala organizes the published evidence; go over any change with your doctor, especially if you take meds.