Iron
The Iron form we carry
See how we score it — absorption, bioavailability & formulary tier
Quick Answer
What is Iron used for?
Iron is commonly used to support red blood cell formation, energy, prenat. Our summary here is backed by 4 cited studies.
All Forms of Iron
| Form | Tier | Form Score | Dose Range | Unit |
|---|---|---|---|---|
| Ferrous Bisglycinate Chelate | Preferred | 95/100Top Tier | — | — |
Absorption by Form
What is Iron?
Iron is a Mineral supplement available in 1 form.
FormulaForge carries a single form of Iron, so there is no form to choose here. Forms on the market do differ in how well they absorb, which is why it is worth checking the form named on any product label.
The Form of Iron We Carry
Iron (as Ferrous Bisglycinate Chelate) (Ferrochel®) Preferred (Preferred Form) has a bioavailability rating of good absorption.
How to Choose the Right Form
Iron (as Ferrous Bisglycinate Chelate) (Ferrochel®) is classified as Preferred Form by FormulaForge — our top recommendation for Iron. It carries a bioavailability rating of good absorption, meaning more of the active compound reaches your tissues per dose unit compared to lower-rated forms.
When choosing a Iron supplement, read the label for the specific form name — that is what determines how much you actually absorb. Preferred Forms have the strongest research-backed evidence for efficient absorption.
Other forms may be appropriate depending on individual goals, cost considerations, and your healthcare provider’s guidance. The best form for you depends on your specific health needs.
Dosing & Safety
Individual dose requirements vary based on health goals, body weight, and existing nutrient intake. Your healthcare provider can help you determine an appropriate amount of Iron for you.
Side Effects: Consult your healthcare provider regarding tolerability, particularly at higher doses.
These statements are based on structure/function research and have not been evaluated by the Food and Drug Administration. This information is not intended to diagnose, treat, cure, or prevent any disease. Always consult a qualified healthcare provider before starting or changing a supplement regimen.
The Science
The following studies and findings inform FormulaForge classifications for Iron:
Iron bisglycinate chelate demonstrated 2-4x greater bioavailability than ferrous sulfate in iron-deficient women, measured by serum ferritin response. PMID: 10837299
2023 meta-analysis of 18 RCTs confirmed bisglycinate chelate achieves equivalent iron repletion at lower doses with 64% fewer GI adverse events vs sulfate. PMID: 36728680
Chelated iron transport via dipeptide pathway resists inhibition by phytate, polyphenols, and calcium that reduce non-heme iron absorption by 50-90%. PMID: 35358119
Systematic review confirms ferrous bisglycinate as preferred form for supplementation due to superior tolerability and absorption efficiency. PMID: 41082982
Dosing Guidance
Individual dose requirements for Iron vary based on health goals, body weight, and existing dietary intake. A qualified healthcare provider can help you determine an appropriate amount for you.
Frequently Asked Questions
What is Iron and what does it do?
How much Iron should I take?
What does Iron support?
Is Iron safe?
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References
- Iron bisglycinate chelate demonstrated 2-4x greater bioavailability than ferrous sulfate in iron-deficient women, measured by serum ferritin response. PubMed
- 2023 meta-analysis of 18 RCTs confirmed bisglycinate chelate achieves equivalent iron repletion at lower doses with 64% fewer GI adverse events vs sulfate. PubMed
- Chelated iron transport via dipeptide pathway resists inhibition by phytate, polyphenols, and calcium that reduce non-heme iron absorption by 50-90%. PubMed
- Systematic review confirms ferrous bisglycinate as preferred form for supplementation due to superior tolerability and absorption efficiency. PubMed
FormulaForge formulates and sells supplements containing the ingredients discussed on this page. Our formulary recommendations are based on peer-reviewed bioavailability research. All cited studies are independently verifiable.