A complete safety, timing, and dosage guide for combining St. John's Wort with Vitamin B9 (Folate, Folic Acid, Methylfolate) — including how the two supplements interact, the best time of day to take each, and which populations should be careful.
Yes, you can take Vitamin B9 (folate) and St. John's Wort together; these two supplements are safe to combine with no significant interaction.
Vitamin B9 (Folate, Folic Acid, Methylfolate) and St. John's Wort together do not interact meaningfully. You can safely add St. John's Wort to your folate supplement without worrying about reduced effectiveness or unexpected side effects. These two supplements complement your routine through separate pathways.
St. John's Wort is a well-known inducer of cytochrome P450 enzymes, primarily CYP3A4, as well as the drug transporter P-glycoprotein, which is why it accelerates clearance of many medications and supplements. Folate, however, does not rely on these enzyme systems for absorption, metabolism, or cellular action. Folate is absorbed via specialized transporters in the proximal small intestine and converted to its active coenzyme form, 5-methyltetrahydrofolate, through enzymatic steps that are completely independent of the CYP system. Hyperforin, the active compound in St. John's Wort, does not bind to or affect these folate-specific enzymes or transporters. For these reasons, there is no pharmacologic basis for an interaction, and no clinical evidence shows any negative effect when these two are combined.
You can take both supplements at any time of day that suits your schedule, and you don't need to separate them. I suggest taking them in the morning with breakfast to make the habit easier to maintain. If you prefer an empty stomach, that works fine as well—neither requires food for proper absorption, though a light meal may reduce any mild nausea from St. John's Wort. If you are also taking other medications, separate St. John's Wort from those by at least two hours, but your folate can stay right with St. John's Wort. Should you miss a dose, just resume with your next meal; doubling up is unnecessary.
The form of folate you take doesn't change the interaction: folic acid, food-derived folate, and 5-MTHF (methylfolate) all share the same transport and conversion steps that St. John's Wort does not disrupt. If you choose methylfolate for genetic reasons such as an MTHFR variant, it remains just as safe with St. John's Wort. St. John's Wort extracts standardized to hyperforin or hypericin behave the same way. No specific formulation of either supplement creates a special concern.
These two are not usually bundled together in commercial stacks, as St. John's Wort is typically taken as a standalone herbal extract to minimize drug interactions. You may find folate included in a B-complex or prenatal vitamin while St. John's Wort is a separate product bought independently.
Yes, you can take them at the same time without concern. The absorption and metabolic pathways for folate are completely separate from the enzyme systems that St. John's Wort affects, so neither will change how the other works.
Yes, it is safe to combine them daily. St. John's Wort will not deplete your folate or reduce the benefits of your supplement, and there is no evidence that taking both together causes any cumulative harm.
You do not need to wait at all. Taking them at the same time, or even a few minutes apart, makes no difference because there is no interference between the two.
No, they do not compete. Folate uses specialized intestinal transporters and conversion enzymes, while the active compounds in St. John's Wort are absorbed passively and metabolized differently, so there is no competition at the absorption level.
Most people can safely take them together. However, if you are on an SSRI antidepressant, birth control pill, warfarin, or cyclosporine, talk to your doctor before starting St. John's Wort because it interacts with those drugs—not with folate. Pregnant women should also check with their obstetrician first.
You can take them either way. Folate is absorbed well with or without food, and St. John's Wort is generally fine on an empty stomach. If you notice mild nausea, taking St. John's Wort with a light meal will help.
Reviewed by Caroline M. on April 8, 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.