ByDr. Brennan Commerford, Chiropractic Physician·Last reviewed: April 2026
All Ingredients
Mineral1 form

Iron (as Ferrous Bisglycinate Chelate) (Ferrochel®)

Preferred Form
Ferrous Bisglycinate Chelate
Bioavailability
S2
Evidence Level
High Evidence

Quick Answer

What is the best form of Iron (as Ferrous Bisglycinate Chelate) (Ferrochel®)?

Ferrous Bisglycinate Chelate is our top-ranked form of Iron (as Ferrous Bisglycinate Chelate) (Ferrochel®), classified as T1 Preferred with S2 bioavailability. We compared 1 forms in our formulary.

Our recommendation: Ferrous Bisglycinate Chelate

1forms compared

All Forms of Iron (as Ferrous Bisglycinate Chelate) (Ferrochel®)

FormTierBioavailabilityDose RangeUnit
Ferrous Bisglycinate ChelateT1 PreferredS2

Bioavailability by Form

S2 — Good
Ferrous Bisglycinate Chelate

What is Iron (as Ferrous Bisglycinate Chelate) (Ferrochel®)?

Iron (as Ferrous Bisglycinate Chelate) (Ferrochel®) is a Mineral supplement available in 1 form.

Not all forms of Iron (as Ferrous Bisglycinate Chelate) (Ferrochel®) are equal. The form you choose determines how much Iron (as Ferrous Bisglycinate Chelate) (Ferrochel®) actually reaches your tissues, and the difference between the best and worst forms can be substantial. Ferrochel (ferrous bisglycinate chelate) delivers 2-4x greater iron absorption than ferrous sulfate with dramatically less GI side effects (nausea, constipation, dark stools). The chelated form is not affected by dietary inhibitors like phytates, tannins, and calcium — allowing it to be taken with meals or other supplements without absorption interference.

Forms of Iron (as Ferrous Bisglycinate Chelate) (Ferrochel®) Compared

Iron (as Ferrous Bisglycinate Chelate) (Ferrochel®) Preferred (T1 Preferred) has a bioavailability rating of good (S2). Typical dose range: not yet documented in our database.

What the Research Shows

Ferrous bisglycinate chelate (Ferrochel) is the most bioavailable and best-tolerated oral iron form. Multiple clinical trials demonstrate 2-4x greater absorption compared to ferrous sulfate, with significantly less GI distress (nausea, constipation). The chelated form does not interact with dietary inhibitors like phytates and tannins, and can be taken with or without food.

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

How to Choose the Right Form

Iron (as Ferrous Bisglycinate Chelate) (Ferrochel®) is classified as T1 Preferred in the FormulaForge formulary — our top recommendation for Iron (as Ferrous Bisglycinate Chelate) (Ferrochel®). It carries a bioavailability rating of good (S2), meaning more of the active compound reaches your tissues per dose unit compared to lower-tier forms.

When choosing a Iron (as Ferrous Bisglycinate Chelate) (Ferrochel®) supplement, look for the S1 (best absorption) bioavailability tier on the label or formulary listing. T1 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

For Iron (as Ferrous Bisglycinate Chelate) (Ferrochel®), the typical dosing range is not yet documented in our database. Individual dose requirements vary based on health goals, body weight, and existing nutrient intake.

Side Effects: Specific side effect data for these forms is not yet documented in our database. In general, consult your healthcare provider regarding tolerability at higher doses.

These statements are based on structure/function research and have not been evaluated by the FDA. 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 our formulary classifications for Iron (as Ferrous Bisglycinate Chelate) (Ferrochel®):

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

Dosing information not yet available for this ingredient.

Frequently Asked Questions

What is the best form of Iron (as Ferrous Bisglycinate Chelate) (Ferrochel®)?
Iron (as Ferrous Bisglycinate Chelate) (Ferrochel®) is the T1 Preferred form of Iron (as Ferrous Bisglycinate Chelate) (Ferrochel®) in the FormulaForge formulary, reflecting research-backed evidence for superior bioavailability (good (S2)). This classification is based on published absorption studies and clinical evidence quality. The best form for you depends on your individual health goals and your healthcare provider's recommendations. Always consult a qualified healthcare provider before starting, stopping, or adjusting any supplement regimen.
How much Iron (as Ferrous Bisglycinate Chelate) (Ferrochel®) should I take daily?
Dosing information for Iron (as Ferrous Bisglycinate Chelate) (Ferrochel®) is being compiled in our database. Individual dose requirements vary based on health goals and existing nutrient intake. Always consult a qualified healthcare provider before starting, stopping, or adjusting any supplement regimen. These statements are based on structure/function research and have not been evaluated by the FDA. This information is not intended to diagnose, treat, cure, or prevent any disease.
What are the benefits of Iron (as Ferrous Bisglycinate Chelate) (Ferrochel®)?
Iron (as Ferrous Bisglycinate Chelate) (Ferrochel®) has been studied for its role in supporting: Supports healthy red blood cell formation and oxygen transport, Supports energy production and reduced fatigue, Supports cognitive function and mental clarity, Supports immune system function, Supports healthy pregnancy outcomes. Ferrous bisglycinate chelate (Ferrochel) is the most bioavailable and best-tolerated oral iron form. Multiple clinical trials demonstrate 2-4x greater absorption compared to ferrous sulfate, with significantly less GI distress (nausea, constipation). The chelated form does not interact with dietary inhibitors like phytates and tannins, and can be taken with or without food. These statements are based on structure/function research and have not been evaluated by the FDA. This information is not intended to diagnose, treat, cure, or prevent any disease.
When is the best time to take Iron (as Ferrous Bisglycinate Chelate) (Ferrochel®)?
Optimal timing for Iron (as Ferrous Bisglycinate Chelate) (Ferrochel®) supplementation depends on the specific form, dosage, and individual factors. Some forms may be better absorbed with food; others may not require food. Always consult a qualified healthcare provider before starting, stopping, or adjusting any supplement regimen.
Are there side effects of taking Iron (as Ferrous Bisglycinate Chelate) (Ferrochel®)?
Tolerability of this Mineral supplement varies by individual, dose, and specific form. Some individuals may experience gastrointestinal discomfort at higher doses. Specific side effect profiles for each form of Iron (as Ferrous Bisglycinate Chelate) (Ferrochel®) are documented in our formulary where available. Always consult a qualified healthcare provider before starting, stopping, or adjusting any supplement regimen. These statements are based on structure/function research and have not been evaluated by the FDA. This information is not intended to diagnose, treat, cure, or prevent any disease.
What forms of Iron (as Ferrous Bisglycinate Chelate) (Ferrochel®) are available?
There are 1 form of Iron (as Ferrous Bisglycinate Chelate) (Ferrochel®) in our formulary: Iron (as Ferrous Bisglycinate Chelate) (Ferrochel®) (T1 Preferred, bioavailability: good (S2)). Forms differ in chemical structure, bioavailability, and typical dose range. FormulaForge classifies forms by tier based on published bioavailability evidence.

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Our formulary recommends Ferrous Bisglycinate Chelate for optimal bioavailability. Build your personalized formula now.

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References

  1. Iron bisglycinate chelate demonstrated 2-4x greater bioavailability than ferrous sulfate in iron-deficient women, measured by serum ferritin response. PubMed
  2. 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
  3. Chelated iron transport via dipeptide pathway resists inhibition by phytate, polyphenols, and calcium that reduce non-heme iron absorption by 50-90%. PubMed
  4. 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.