VitaminDB Data · November 2026
The real cost of St. John's Wort, per dose
For the exact same amount of St. John's Wort — the same mg of active ingredient — the priciest products cost a 4.4× premium over the cheapest. We measured it across 23 tracked products, normalized to cost per mg.
Is the premium brand worth it?
On price, usually not. Two bottles of St. John's Wort can carry the identical active dose at wildly different prices — the spread between the cheap and the premium end is 4.4× per mg, from a low around $0.0002 to a high near $0.0007. A higher sticker price is not a reliable signal of a better product; most of that gap is branding and margin, not more St. John's Wort. Pay up only for a verifiable difference — third-party testing, or a specific better-absorbed form — never for the packaging.
Right now the best value in our catalog is Amazing Formulas St. John's Wort Supplement… at $0.07 per serving — against a catalog median of $0.123/serving.
How we calculated it
Cost per active unit = price ÷ (servings per container × dose per serving), measured in St. John's Wort’s dominant dose unit (mg) so we only ever compare like with like — mg of St. John's Wort against mg of St. John's Wort.
Spread = the 90th-percentile cost per mg ÷ the 10th-percentile. Using the 10th/90th percentiles (not the absolute min/max) deliberately excludes one-off outliers and mislabeled listings. Based on 23 active St. John's Wort products from our live Amazon US catalog, recomputed hourly. This is a value comparison, not medical or dosing advice.
Part of the catalog-wide supplement price-spread study (median 7.8× across 87 nutrients).
Free to cite
Quote these figures with a link back to this page. Key data point (as of November 2026): for the same dose of St. John's Wort, the priciest products cost 4.4× more than the cheapest per mg, across 23 tracked products.
St. John's Wort cost FAQ
- How much does St. John's Wort vary in price for the same dose?
- For the same amount of St. John's Wort (per mg), the most expensive products cost about 4.4× more than the cheapest — based on 23 tracked products, comparing the 90th vs 10th percentile cost per mg. The median is $0.0004 per mg.
- Is the premium St. John's Wort brand worth it?
- On price alone, usually not: the priciest options deliver the same mg of St. John's Wort for up to 4.4× the cost. A higher price is not a reliable quality signal — pay more only for a verifiable difference such as third-party testing or a specific better-absorbed form, not for packaging.
- What is the cheapest St. John's Wort per dose right now?
- Amazing Formulas St. John's Wort Supplement (Hypericum Perforatum Extract)… at $0.07 per serving is the lowest cost-per-dose St. John's Wort in our catalog. See the full ranking on the Best St. John's Wort page.