A complete safety, timing, and dosage guide for combining Vitamin B5 (Pantothenic Acid) 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, vitamin B5 and St. John's Wort are safe to combine — no significant interaction exists.
Vitamin B5 (pantothenic acid) and St. John's Wort together are safe. There is no known mechanism for interaction because B5 does not rely on liver enzymes that St. John's Wort induces. You can add St. John's Wort to your current B5 supplement without concern.
St. John's Wort is a strong inducer of cytochrome P450 enzymes, particularly CYP3A4, which speeds up the breakdown of many medications. Vitamin B5, however, does not rely on these enzymes for absorption or metabolism; it is absorbed directly in the gut and used to make coenzyme A. Because B5 is water-soluble and follows a distinct metabolic pathway, St. John's Wort's enzyme induction does not affect its levels. No competing receptors or transport proteins have been identified for these two compounds. In short, they work through separate systems in the body, so no interaction occurs.
You can take vitamin B5 and St. John's Wort at the same time or separately, with or without food. If you're taking other medications, take St. John's Wort at the same time each day, ideally with your largest meal. B5 is safe on an empty stomach, but taking it with food may reduce any mild gastrointestinal upset. There is no need to space them apart. If you miss a dose, don't double up — just resume your normal schedule the next day.
Both supplements are commonly used in standard forms: B5 as pantothenic acid or calcium pantothenate, and St. John's Wort as a standardized extract containing hypericin and hyperforin. The lack of interaction holds across these forms. For St. John's Wort, the hyperforin content can vary and is more relevant for drug interactions, but that does not change its safety with B5.
B5 is commonly found in B-complex supplements, stress-support blends, and acne-support formulas. St. John's Wort is not typically stacked with B5 in commercial products, but both may appear in broad-spectrum mood-support formulas.
Yes, I can take them at the same time. There is no known interaction that would affect absorption or effectiveness. I can even take them in the same meal.
Yes, it is safe for me to combine them daily. No long-term interaction has been documented. I should still monitor how I feel, especially if I start St. John's Wort for the first time.
I don't need to wait at all. I can take them together or whenever convenient.
No, they don't compete. Vitamin B5 is absorbed in the upper small intestine via sodium-dependent transporters, while St. John's Wort's active compounds are absorbed differently. Their absorption pathways don't overlap.
Most people can take them together safely. However, I should avoid St. John's Wort entirely if I'm pregnant, breastfeeding, or taking certain prescription medications like antidepressants, birth control pills, or blood thinners. Vitamin B5 alone is safe for nearly everyone.
I can take both with or without food. Taking them with a meal may help reduce any mild stomach discomfort, especially for St. John's Wort.
Reviewed by Caroline M. on June 11, 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.