Thorne Research Iron Bisglycinate
Brand: Thorne Research · Form: CAPSULE [E0159]
Our assessment
The evidence shows that iron bisglycinate is a well-absorbed form of iron with a lower risk of gastrointestinal side effects compared to ferrous sulfate. Data indicates that 25 mg of elemental iron from this supplement meets the daily value for iron for most adults [NIH ODS]. For those with confirmed iron deficiency, this form is a practical choice [NIH ODS].
How it works
Think of iron as a critical carrier for oxygen in your blood. Iron bisglycinate is a chelated form, meaning the iron is bound to the amino acid glycine, which helps it pass through your intestinal lining more easily and with less irritation than standard iron salts [NIH ODS]. This process supports red blood cell production and energy metabolism [NIH ODS].
Safety profile
Data not available on adverse event reports for this specific product. General FDA data on iron supplements shows side effects can include constipation, nausea, and stomach upset, though these are less common with bisglycinate forms [FDA data]. Taking iron with food can reduce stomach upset but may lower absorption [NIH ODS].
Our recommendation
Start by having your ferritin and hemoglobin levels tested to confirm a need for supplementation. Take one capsule daily with a small amount of vitamin C (like a glass of orange juice) to enhance absorption [NIH ODS]. Do not exceed the recommended dose unless directed by your healthcare provider, as excess iron can be toxic [NIH ODS].
AI-assisted analysis. Data sourced from NIH DSLD.
Supplement Facts
| Brand | Thorne Research |
|---|---|
| Serving Size | |
| Contents | 60.0 Vegetarian 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