A complete safety, timing, and dosage guide for combining Vitamin B7 (Biotin) with St. John's Wort — including how the two supplements interact, the best time of day to take each, and which populations should be careful.
Yes, you can safely combine Vitamin B7 (Biotin) and St. John's Wort because they do not interact in any meaningful way.
Vitamin B7 (Biotin) and St. John's Wort together are neutral, meaning no significant interaction exists. Biotin is a water-soluble B vitamin while St. John's Wort works through different pathways, so combining them is safe for most adults. This pairing does not require any special timing or dose adjustments.
Biotin (vitamin B7) is a water-soluble B vitamin absorbed through a sodium-dependent multivitamin transporter in the small intestine. St. John's Wort's active compounds, hypericin and hyperforin, are absorbed passively and induce cytochrome P450 enzymes, especially CYP3A4 and CYP2C19. Biotin is not metabolized by these enzymes, nor does it influence their activity. There is no shared transport protein, receptor, or enzyme pathway where the two could interfere. Therefore, the neutral safety profile is expected based on their independent absorption and metabolism.
If you need both, there is no reason to separate them. I usually suggest taking biotin and St. John's Wort together with a morning meal to improve compliance and reduce any mild stomach upset. If you miss a dose, just take it at your next planned meal and do not double up. Choose a biotin dose around 30–100 mcg for general health unless your doctor recommends more. For St. John's Wort, follow the product's standard dosing, typically 300 mg three times daily if using a 0.3% hypericin extract, but always start with the lowest effective dose.
D-biotin is the only biologically active form, but whether it comes from a B-complex, softgel, or gummy does not affect this interaction. St. John's Wort is often standardized to 0.3% hypericin or 3–5% hyperforin, but the chosen extract type also does not change the lack of interaction. I would still choose a standardized St. John's Wort product for consistent dosing and quality.
Biotin is a staple in hair, skin, and nail supplement stacks alongside zinc, collagen, and vitamin C. St. John's Wort is rarely combined with biotin in commercial products, but it often appears in mood-support blends with vitamin D and magnesium.
Yes, you can take biotin and St. John's Wort at the same time. They do not compete for absorption and no interaction has been reported. I would just take both with a meal for consistency.
Yes, it is safe to take this pair daily at recommended doses. Biotin is water-soluble and excess is excreted in urine, while St. John's Wort is generally well-tolerated for a few months of use. Just monitor for any new side effects and let your doctor know.
You don't need to wait any specific amount of time. Since there is no known interaction, taking them together or at different times of day will not affect how well either works.
No, they do not compete. Biotin is absorbed via a specific sodium-dependent transporter in the small intestine, while St. John's Wort compounds are absorbed passively. These separate pathways mean there is no real competition.
Most healthy adults can take them together safely, but people on antidepressants, hormonal birth control, or blood thinners should avoid St. John's Wort due to herb-drug interactions. Biotin can also skew lab tests, so tell your doctor if you take it.
You can take biotin on an empty stomach or with food, but taking it with food may reduce any mild nausea. St. John's Wort is best taken with food to lower the risk of stomach upset and to ensure consistent absorption.
Reviewed by Caroline M. on April 15, 2026 for accuracy against the sources listed above. This page is educational and is not a substitute for professional medical advice.
The matrix has 86 supplements and 7310 pairwise interactions. Click any cell to see the full breakdown.