Thorne Iron Bisglycinate
Brand: Thorne · Form: CAPSULE [E0159]
Our assessment
The evidence shows that iron bisglycinate is a well-absorbed form of iron that is often gentler on the stomach than other types. For you, this supplement can be an effective way to address low iron levels or maintain healthy iron stores, especially if you have experienced digestive upset with other iron supplements. However, the specific data for the Thorne brand product you asked about is limited to the ingredient form itself.
How it works
Iron bisglycinate is a form of iron where the mineral is chelated (bound) to the amino acid glycine. This structure allows the iron to be absorbed more efficiently through the intestinal wall without competing with other minerals for uptake [NIH ODS]. Think of the glycine as a transport vehicle that delivers the iron directly into your bloodstream, which can help reduce the common side effects of nausea and constipation often seen with other iron salts like ferrous sulfate [NIH ODS].
Safety profile
Based on the FDA adverse event reporting system, there are 0 adverse event reports specifically for the Thorne Iron Bisglycinate product. Data not available for specific side effect counts from the FDA for this exact product. General side effects from iron supplements can include nausea, constipation, and dark stools [NIH ODS].
Our recommendation
Start with one capsule daily, as directed on the label. It is best taken on an empty stomach, but if you experience any stomach upset, take it with a small amount of food. Avoid taking it with calcium-rich foods or drinks like milk, as calcium can reduce iron absorption. If you are not iron deficient, do not take this supplement without consulting your healthcare provider, as excess iron can be harmful [NIH ODS].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | Thorne |
|---|---|
| Serving Size | |
| Contents | 60.0 Capsule(s) |
| Market Status | Off Market |
How to Read This Label
Supplement labels contain several key sections regulated by the FDA:
- Serving Size — The recommended amount per dose. Always check this — some products require multiple capsules per serving.
- Amount Per Serving — Shows the quantity of each nutrient in the product, typically in IU (International Units), mg (milligrams), or mcg (micrograms).
- % Daily Value (%DV) — Indicates how much a nutrient in a serving contributes to a daily diet. 5% DV or less is low; 20% DV or more is high.
- Other Ingredients — Lists inactive ingredients like fillers, binders, and capsule materials (e.g., gelatin, cellulose, magnesium stearate).
- Suggested Use — The manufacturer's recommended directions for taking the supplement, including timing and dosage.
Source: FDA Dietary Supplement Labeling Guide