Vitamin B6: what it does, by goal, and the dose that worked
What the 251 human studies of vitamin B6 we graded show for each goal, the dose that worked, and the products that hold it. This page is educational, not medical advice.
What it does, by goalMembersThe top 5 of 23 goals
7 of these 251 human studies gave vitamin B6 by drip or injection, not by mouth.
| Goal | What the studies show | Studies | Dose that worked |
|---|---|---|---|
| Improved in studies 29 studies, 8 showed an improvement, 9 found none | 29 | 10 mg | |
| Improved in studies 29 studies, 7 showed an improvement, 8 found none, 5 pooled analyses | 29 | 25 mg | |
| Improved in studies 19 studies, 6 showed an improvement, 2 found none, 1 pooled analysis | 19 | – | |
| Improved in studies 19 studies, 4 showed an improvement, 5 found none | 19 | 3 mg | |
| Improved in studies 10 studies, 3 showed an improvement, 1 found none | 10 | 50 mg | |
| Improved in studies 10 studies, 3 showed an improvement, 1 found none, 1 by drip, injection or inhaler | 10 | – | |
| Improved in studies 4 studies, 3 showed an improvement | 4 | 1.8 mg | |
| Improved in studies 10 studies, 2 showed an improvement, 5 found none, 1 by drip, injection or inhaler | 10 | 400 mg | |
| Improved in studies 5 studies, 2 showed an improvement, 1 found none, 1 pooled analysis | 5 | 200 mg | |
| Improved in studies 5 studies, 2 showed an improvement, 1 found none | 5 | – | |
| Improved in studies 2 studies, both showed an improvement, 1 pooled analysis | 2 | – | |
| Improved in studies 18 studies, 1 showed an improvement, 2 found none | 18 | – | |
| Improved in studies 2 studies, 1 showed an improvement, 2 by drip, injection or inhaler | 2 | – | |
| Too few studies 2 studies, 1 found none | 2 | – | |
| Too few studies 1 study, it found no effect | 1 | – | |
| No effect in studies 45 studies, 18 showed an improvement, 13 found none, 3 pooled analyses | 45 | 3 mg | |
| No effect in studies 24 studies, 5 showed an improvement, 10 found none, 1 pooled analysis | 24 | 40 mg | |
| No effect in studies 23 studies, 4 showed an improvement, 5 found none, 3 pooled analyses, 1 by drip, injection or inhaler | 23 | 50 mg | |
| No effect in studies 17 studies, 3 showed an improvement, 8 found none, 1 pooled analysis, 1 by drip, injection or inhaler | 17 | 50 mg | |
| No effect in studies 14 studies, 1 showed an improvement, 7 found none, 5 pooled analyses | 14 | 960 mcg | |
| No effect in studies 9 studies, 3 found none | 9 | – | |
| No effect in studies 7 studies, 3 found none, 2 by drip, injection or inhaler | 7 | – | |
| No effect in studies 2 studies, 1 found none, 1 pooled analysis | 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 3 of 26
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Dose and safetyThe dose that worked and the upper limit
The studies taken by mouth that showed an improvement gave 960 mcg to 400 mg a day.
The upper limit for adults is 100 mg of vitamin B6 a day; above it, members see a note and are told they can take less.
Biohacker panelMembersWhat our 10 biohackers say about vitamin B6
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Questions people askMembersAnswered from the figures on this page
What is vitamin B6 good for?
Answer for members.
How much vitamin B6 a day?
Answer for members.
Can I take vitamin B6 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 →