A complete safety, timing, and dosage guide for combining Copper 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 take copper and St. John's Wort together. These two supplements do not interfere with each other, so adding St. John's Wort while continuing your copper supplement is fine for most people.
Copper and St. John's Wort together are a safe combination with no meaningful interaction. Copper is a trace mineral that relies on its own transport proteins, while St. John's Wort mainly affects liver enzymes that process certain medications, not minerals. You don't need to adjust your routine when adding St. John's Wort to a copper supplement.
Copper is absorbed primarily in the stomach and upper small intestine via the Ctr1 transport protein, and its absorption is affected mainly by zinc, iron, and vitamin C, not by herbal extracts. St. John's Wort is a potent inducer of cytochrome P450 enzymes, particularly CYP3A4, which speeds up the breakdown of many drugs in the liver. Because copper is a mineral and does not rely on CYP450 enzymes for absorption or elimination, there is no biological pathway where these two supplements would directly compete or change each other's effects. St. John's Wort can affect gut motility in some people, but that would not meaningfully alter copper bioavailability. In short, the two act through separate systems in the body, which is why they are considered a neutral pair.
Take copper and St. John's Wort together with a meal containing a little protein to minimize any stomach sensitivity and support absorption. There is no need to space them apart, so you can take them at breakfast or lunch, whichever is easier for you to remember. If you happen to miss a dose of either supplement, just skip it and resume your next scheduled dose; do not double up. If you are also taking zinc, separate the zinc from copper by at least two hours so both minerals can be absorbed properly. For St. John's Wort, the typical dose for mood support is 300 mg three times daily, but follow the label of the specific product you chose.
Copper supplements come in forms such as cupric oxide, cupric sulfate, cupric citrate, and copper glycinate chelate; the oxide form is less bioavailable than citrate or glycinate, but this does not affect its interaction with St. John's Wort. St. John's Wort is commonly standardized to hypericin or hyperforin content, and while these compounds drive the herb's enzyme-inducing effects, none of that changes how copper is handled by your body. Choose a well-absorbed copper form for general benefit, but know that the lack of interaction applies to all common forms of both supplements.
Copper is rarely combined with St. John's Wort in commercial products, since copper is typically added to multivitamins and prenatal formulations while St. John's Wort is usually sold as a standalone herbal supplement for mood support.
Yes, you can take them at the same time. I find no evidence that St. John's Wort affects copper absorption or copper's role in your body, so there is no reason to separate them.
Yes, it is safe to combine copper with St. John's Wort daily. I would just remind you to keep your copper dose within the recommended amount and to monitor how St. John's Wort affects any medications you take.
You do not need to wait at all. These two supplements do not compete for absorption or share a metabolic pathway, so you can take them together.
No, they do not compete for absorption. Copper uses a specific mineral transporter in the gut, while St. John's Wort is absorbed as plant compounds, so there is no shared mechanism.
People with Wilson's disease or other copper storage conditions should avoid copper entirely. Also, anyone taking antidepressants, birth control, blood thinners, or other medications should talk to a doctor before using St. John's Wort, but that is not related to copper.
I recommend taking copper with a light meal to reduce nausea, and St. John's Wort can also be taken with food if it helps your stomach. An empty stomach is fine for both, but food makes them easier to tolerate.
Reviewed by Caroline M. on April 7, 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.