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St. John's wort
Full ranking Dose tool Products (117)
Key facts
Daily Value (US FDA)—
Tolerable Upper Intake Level (UL)— Authoritative daily maximum: 4,200 mg
Median（Per day）300 mgP5 20 – P95 880
Products117
Sources: https://webprod.hc-sc.gc.ca/nhpid-bdipsn/atReq?atid=stjohnswort.millepertuis.ora · Health Canada NNHPD monograph: 2-12.6 g dried herb/day, 4.2 g single; extract 600-1,800 mg
Daily dose across products（mg/day）
Authoritative daily maximum 4,200
4 mglog scale · n=1172,000 mg
Label data from official national databases and brand websites, as declared; not lab-verified.
Top ranked
| Rank | Brand | Product | Per day | Score |
|---|---|---|---|---|
| 1 | Metagenics | St. John's Wort with Folate and B12 | 900 mg | 90.0 |
| 2 | Nutralab Canada Corp. | MapleLife Nutrition and Formula St. John's Wort | 300 mg | 84.0 |
| 2 | NOW Health Group, Inc. | Now St. John’s Wort Extract | 300 mg | 84.0 |
| 2 | GFR Pharma Ltd. | St. John's Wort | 300 mg | 84.0 |
| 2 | International Vitamin Corporation | St. John's Wort 300 mg Standardized Extract Capsules | 300 mg | 84.0 |
For information only; not medical advice. Talk to a doctor or pharmacist before starting or stopping any supplement.