Calcium carbonate: what the studies show, and the products
117 of the human studies we graded used calcium carbonate, and 29 showed an improvement. Its products are graded on the studies of every form of calcium. This page is educational, not medical advice.
What it does, by goalMembersThe top 5 of 12 goals
| Goal | What the studies show | Studies | Dose that worked |
|---|---|---|---|
| Improved in studies 12 studies, 6 showed an improvement, 1 found none | 12 | 420 mg | |
| Improved in studies 13 studies, 2 showed an improvement, 3 found none | 13 | – | |
| Too few studies 4 studies, 2 showed an improvement, 1 found none | 4 | 1 g | |
| Too few studies 1 study, no clear result | 1 | – | |
| No effect in studies 47 studies, 13 showed an improvement, 19 found none, 4 pooled analyses | 47 | 300 mg | |
| No effect in studies 24 studies, 3 showed an improvement, 9 found none | 24 | 500 mg | |
| No effect in studies 3 studies, 2 showed an improvement, 1 found none | 3 | 1.2 g | |
| No effect in studies 2 studies, 1 showed an improvement, 1 found none | 2 | 2 g | |
| No effect in studies 2 studies, 1 found none | 2 | – | |
| No effect in studies 2 studies, 1 found none | 2 | – | |
| No effect in studies 1 study, it found no effect | 1 | – | |
| No effect in studies 1 study, it found no effect | 1 | – |
Members see which goal each result is for, and the products for it. Start My 7-Day Free Trial →
Products – highest ranked firstMembersThe top 3 of 12
Dose and safetyThe dose that worked and the upper limit
The studies of calcium carbonate taken by mouth that showed an improvement gave 300 mg to 2 g a day.
The upper limit for adults is 2,500 mg of calcium a day, counted as the calcium 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 calcium carbonate
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 calcium carbonate good for?
Answer for members.
How much calcium carbonate a day?
Answer for members.
Can I take calcium carbonate 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 →