A complete safety, timing, and dosage guide for combining Creatine Monohydrate 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 creatine monohydrate and St. John's Wort together safely—they do not significantly interact. Adding St. John's Wort to your creatine routine is fine for most people.
Creatine monohydrate and St. John's Wort together do not interact in any significant way. Creatine supports energy production in muscle cells, while St. John's Wort acts on mood-related pathways, so combining them at standard doses is considered safe.
Creatine monohydrate is a water-soluble compound that enters muscle cells via a dedicated creatine transporter and is not processed by cytochrome P450 liver enzymes. St. John's Wort is a known inducer of CYP3A4 and CYP2C19, but creatine is not a substrate for these enzymes, so it does not alter creatine levels or clearance. Pharmacologically, creatine works through the phosphocreatine energy system, while St. John's Wort modulates serotonin reuptake and other neurotransmitter pathways—these distinct mechanisms do not overlap. Thus, there is no biologically plausible basis for a meaningful interaction.
A simple approach is to take creatine in the morning with water and St. John's Wort with breakfast or another meal. There is no need to time them apart, but taking SJW with food can minimize digestive discomfort. If you miss a dose of either, simply take the next scheduled dose—do not double up. For creatine, consistency matters more than the time of day. Follow the label directions for each product, typically 3–5 g of creatine monohydrate daily and 300–600 mg of standard SJW extract.
Yes, you can take them at the same time because they don't interact. I usually tell my clients to take creatine with water and SJW with a meal, but there is no need to space them out.
Yes, it is safe to use both daily as directed. I would just remind you to watch for SJW's interactions with any prescription medications you might be taking.
You do not need to wait at all. Taking them together is fine, but if you prefer, a 2-hour gap can help you remember them separately.
No, they use different absorption and metabolism pathways. Creatine is absorbed directly from the gut, while SJW's active compounds are processed differently, so competition is not a concern.
Most healthy adults can take both, but I would avoid SJW entirely if you are on antidepressants or other interacting drugs. People with kidney disease should be cautious with creatine and check with their doctor.
Creatine can be taken either way, though taking it with a meal may help absorption. St. John's Wort is best taken with food to avoid stomach upset.
Reviewed by Caroline M. on April 3, 2025 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.