A complete safety, timing, and dosage guide for combining Manganese 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 take Manganese and St. John's Wort together — they have no known interaction and are safe to combine.
Manganese and St. John's Wort together are safe and do not interact in any meaningful way. St. John's Wort induces liver enzymes that affect drug metabolism, but manganese is a trace mineral absorbed through separate pathways. This combination is fine for most adults without medication interactions.
Manganese is absorbed in the small intestine through divalent metal transporters and is tightly regulated by the body’s iron status and hepatic clearance. St. John’s Wort is a potent inducer of cytochrome P450 enzymes (CYP3A4, CYP1A2) and P-glycoprotein, but these pathways are involved in drug and hormone metabolism, not mineral uptake or transport. Because manganese does not rely on CYP450 metabolism or P-glycoprotein for absorption or excretion, St. John’s Wort does not alter manganese levels. Conversely, manganese does not affect the serotonergic or enzyme-inducing actions of St. John’s Wort. There is no competition for a shared transporter or receptor, so the two can be taken together without timing adjustments.
Take both supplements with a meal to minimize stomach upset and enhance tolerance. There is no required spacing between Manganese and St. John’s Wort, so you can take them together at breakfast or lunch. If you take a multivitamin containing manganese, count that toward your daily total and avoid additional high-dose manganese unless directed by a clinician. For St. John’s Wort, take it at the same time each day to establish a routine, and if you miss a dose, simply skip it and resume the next day. If you take iron or calcium at a separate time, keep manganese with the same meal but separate from those minerals by at least two hours.
For this combination, the specific form of each supplement makes no meaningful difference. Manganese is available as gluconate, citrate, sulfate, and amino acid chelates, and all are absorbed adequately. St. John’s Wort is typically standardized to hypericin or hyperforin, but none of these forms interact with manganese. Choose reputable brands and avoid proprietary blends that include unlisted minerals.
Manganese is commonly found in bone health and joint support formulas with calcium, vitamin D, and glucosamine. St. John’s Wort is usually sold alone or in mood-support blends, so this pair is not a standard commercial combination.
Yes, you can take them at the same time without any known interaction. I have seen no evidence that St. John’s Wort affects manganese absorption. Both are fine with a meal, so you can simplify your routine by taking them together.
Yes, combining every day is safe for most people. Manganese is a trace mineral with a tolerable upper limit, so just stay within the recommended dietary allowance. St. John’s Wort has its own medication interactions, so be sure your doctor and pharmacist know you take it.
No waiting is necessary. You can take them together or at any time of day that suits you. If you notice stomach discomfort, separating them by a couple of hours may help.
No, they do not compete for absorption. Manganese uses mineral transport pathways, while St. John’s Wort is absorbed through passive diffusion and does not interfere with metal transporters. You can take them together without concern.
People on antidepressants, blood thinners, birth control pills, or immunosuppressants should avoid St. John’s Wort because of its strong drug interactions. Those with liver disease or iron-deficiency anemia should be cautious with manganese. Pregnant or breastfeeding women should skip St. John’s Wort entirely.
Take both with food to reduce any chance of stomach upset. St. John’s Wort can be taken on an empty stomach, but food helps with tolerance and may improve absorption. Manganese is better tolerated with a meal, so eating a balanced breakfast or lunch is a good approach.
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.