Ferrous sulfate: what the studies show, and the products
39 of the human studies we graded used ferrous sulfate, and 9 showed an improvement. Its products are graded on the studies of every form of iron. This page is educational, not medical advice.
What it does, by goalMembersThe top 5 of 11 goals
| Goal | What the studies show | Studies | Dose that worked |
|---|---|---|---|
| Improved in studies 6 studies, 4 showed an improvement, 1 found none | 6 | 300 mg | |
| Improved in studies 3 studies, 2 showed an improvement | 3 | 80 mg | |
| Improved in studies 1 study, it showed an improvement | 1 | 600 mg | |
| Too few studies 3 studies, 1 showed an improvement, 1 found none | 3 | 325 mg | |
| Too few studies 2 studies, 1 found none | 2 | – | |
| Too few studies 2 studies, no clear result yet | 2 | – | |
| Too few studies 1 study, no clear result | 1 | – | |
| No effect in studies 3 studies, 1 showed an improvement, 1 found none | 3 | 7.5 mg | |
| No effect in studies 4 studies, 4 found none | 4 | – | |
| No effect in studies 2 studies, 1 found none | 2 | – | |
| No effect in studies 2 studies, both found no effect | 2 | – |
Members see which goal each result is for, and the products for it. Start My 7-Day Free Trial →
Products – highest ranked firstMembersThe top 2 of 2
Dose and safetyThe dose that worked and the upper limit
The studies of ferrous sulfate taken by mouth that showed an improvement gave 7.5 to 600 mg a day.
The upper limit for adults is 45 mg of iron a day, counted as the iron itself, not the weight of the compound; above it, members see a note and are told they can take less.
Biohacker panelMembersWhat our 10 biohackers say about ferrous sulfate
Members see which forms the panel backs, and what each biohacker said. Start My 7-Day Free Trial →
Questions people askMembersAnswered from the figures on this page
What is ferrous sulfate good for?
Answer for members.
How much ferrous sulfate a day?
Answer for members.
Can I take ferrous sulfate with my meds?
Answer for members.
Members see the answers, checked against their own meds and goals. Start My 7-Day Free Trial →
Educational, not medical advice. Figures come from the human studies on PubMed we have graded; a study counts for a form when it names the form it used. Updated as new studies arrive. How we grade →