St. John's Wort: what it does, by goal, and the dose that worked
What the 57 human studies of st. john's wort 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 1 of 1 goals
1 of these 57 human studies gave st. john's wort by drip, not by mouth.
| Goal | What the studies show | Studies | Dose that worked |
|---|---|---|---|
| Improved in studies 57 studies, 26 showed an improvement, 11 found none, 9 pooled analyses, 1 by drip, injection or inhaler | 57 | 600 mg |
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Products – highest ranked firstMembersThe top 1 of 1
Dose and safetyThe dose that worked and the upper limit
The studies taken by mouth that showed an improvement gave 600 mg to 1.8 g a day.
Biohacker panelMembersWhat our 10 biohackers say about st. john's wort
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Questions people askMembersAnswered from the figures on this page
What is st. john's wort good for?
Answer for members.
How much st. john's wort a day?
Answer for members.
Can I take st. john's wort with my meds?
Answer for members.
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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 →