Iodine: what it does, by goal, and the dose that worked
What the 164 human studies of iodine 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 11 goals
6 of these 164 human studies gave iodine by injection or inhaler, not by mouth.
| Goal | What the studies show | Studies | Dose that worked |
|---|---|---|---|
| Improved in studies 45 studies, 9 showed an improvement, 9 found none, 6 pooled analyses, 1 by drip, injection or inhaler | 45 | 150 mcg | |
| Improved in studies 7 studies, 1 showed an improvement, 2 pooled analyses | 7 | 5 g | |
| Too few studies 2 studies, 1 showed an improvement, 1 found none | 2 | 280 mcg | |
| Too few studies 4 studies, 1 found none | 4 | – | |
| Too few studies 3 studies, 1 found none | 3 | – | |
| Too few studies 2 studies, no clear result yet | 2 | – | |
| No effect in studies 34 studies, 13 showed an improvement, 11 found none, 9 pooled analyses | 34 | – | |
| No effect in studies 31 studies, 8 showed an improvement, 12 found none, 5 pooled analyses | 31 | 150 mcg | |
| No effect in studies 20 studies, 4 showed an improvement, 3 found none, 3 pooled analyses, 3 by drip, injection or inhaler | 20 | 1 % | |
| No effect in studies 17 studies, 4 showed an improvement, 6 found none, 6 pooled analyses, 2 by drip, injection or inhaler | 17 | 0.6 % | |
| No effect in studies 3 studies, 1 found none | 3 | – |
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 taken by mouth that showed an improvement gave 150 mcg to 5 g a day.
Biohacker panelMembersWhat our 10 biohackers say about iodine
Members see what each biohacker said. Start My 7-Day Free Trial →
Questions people askMembersAnswered from the figures on this page
What is iodine good for?
Answer for members.
How much iodine a day?
Answer for members.
Can I take iodine 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 →