MINERALS
Iron (ferrous bisglycinate chelate)
Iron bisglycinate is a gentle form of iron that supports healthy red blood cells and energy.
Also known as: ferrous bisglycinate, iron bisglycinate, gentle iron, Ferrous bisglycinate chelate
At a glance
- Form
- Ferrous bisglycinate chelate
- Category
- Minerals
- In an apiece formula
- 18 mg a day (you can change it)
- Recommended intake
- 18 mg (women 19–50), 8 mg (men; women 51+)
- Upper limit
- 45 mg a day
- Studied for
- Energy & vitality*
- Reference
- NIH ODS: Iron fact sheet
What the research says
In pooled trials, ferrous bisglycinate, the form we use, raised hemoglobin more and caused fewer stomach complaints than other iron forms.*
Systematic review and meta-analysis of RCTs · 17 RCTs (9 in pregnancy, 4 in children) · Fischer JAJ, Nutr Rev 2023. Read the study on PubMed
Who should be careful
Always check with your doctor or pharmacist before adding a supplement if you take medication, are pregnant or nursing, or have a health condition. Stay under the upper limit from all sources combined, including multivitamins.
Symptoms it’s studied for
- Tired or low energy
- Afternoon crash
- Brain fog or poor focus
- Poor sleep
- Catching every cold
- Hair shedding
- Muscle cramps or twitches
From the Journal
- Are personalized vitamins worth it? Personalized blend vs a multivitamin
What a standard multivitamin does well, where it falls short, what research says about personalized nutrition, and how to tell whether a personalized blend makes sense for you.
- Iron and ferritin: who actually needs an iron supplement?
What ferritin and transferrin saturation show, who tends to run low on iron, why to test before taking it, hemochromatosis caution, and how to take iron so it absorbs and sits well.
- Which supplements interact with common medications?
The best-documented supplement and medicine interactions, from vitamin K and warfarin to St. John's wort, minerals and thyroid medicine, and 5-HTP with SSRIs.
- Which blood tests should you check before taking supplements?
The blood tests that can usefully guide supplements, what each one can and can't tell you, and when to recheck after you change what you take.
- Why am I always tired, and what causes the afternoon crash?
The everyday reasons for constant tiredness and the 3 pm slump, which blood tests to ask your doctor about, which nutrients have been studied, and the signs that need a doctor soon.
- What is functional medicine, and how does it use supplements?
What functional and integrative medicine mean, how practitioners use history and labs to choose supplements, and how to judge the evidence and the marketing yourself.
Questions
How much iron a day?
apiece formulas usually include 18 mg a day. The recommended intake for adults is 18 mg (women 19–50), 8 mg (men; women 51+). Upper limit: 45 mg a day.
What is iron used for?
Iron bisglycinate is a gentle form of iron that supports healthy red blood cells and energy. In apiece it is part of formulas for Energy & vitality.*
Who should be careful with iron?
Most adults can take it at the usual amount, but check with your doctor or pharmacist if you take medication, are pregnant or nursing, or have a health condition.
Can I get iron in a personalized supplement?
Yes. apiece builds one daily blend around your goals and, if you have them, your lab results. Iron can be part of it at the amount listed, with every ingredient shown and never more than 10 capsules a day.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This page is general information, not medical advice. Check with your doctor or pharmacist before starting a supplement, especially if you take medication, are pregnant or nursing, or have a health condition. Updated 2026-10-21.