A complete safety, timing, and dosage guide for combining Ginkgo Biloba with Milk Thistle (Silymarin) — including how the two supplements interact, the best time of day to take each, and which populations should be careful.
Yes, you can combine Milk Thistle (Silymarin) and Ginkgo Biloba safely — no significant interaction has been reported at standard doses.
Milk Thistle (Silymarin) and Ginkgo Biloba together do not cause clinically significant interactions. Both herbal extracts are generally well tolerated when taken as directed. No special avoidance is needed, but you should always tell your healthcare provider about every supplement you take.
Silymarin, the active complex in milk thistle, has low water solubility and undergoes extensive first-pass metabolism, primarily via glucuronidation and sulfation, with minor involvement of cytochrome P450 enzymes. Ginkgo biloba's active constituents—flavonoids and terpene lactones—are absorbed independently through passive diffusion and also interact with P-glycoprotein efflux transporters. When taken together, they do not appear to compete for the same intestinal uptake carriers or hepatic enzyme binding sites in a way that changes systemic exposure. Both herbs can modulate CYP3A4 activity to a modest degree, but their net combined influence is not additive or antagonistic enough to be clinically meaningful at standard doses. Therefore, no specific time separation is required for normal use.
If you are taking both milk thistle and ginkgo biloba for general wellness, the simplest approach is to take them together with breakfast and dinner, alongside a meal that contains a little fat to support silymarin absorption. For most adults, a typical dose is 140–300 mg of milk thistle standardized to 80% silymarin twice daily, and 120–240 mg of ginkgo extract once or twice daily. Do not exceed the amounts on the product labels. If you miss a dose, take the next one at the usual time—never double up. If you take prescription medications, separate the supplements from those medications by at least 2 hours to minimize any theoretical interference with drug metabolism.
Standardization matters for both herbs. Milk thistle extracts are typically standardized to 70–80% silymarin, with silibinin (silybinin) being the most biologically active flavonolignan. Ginkgo biloba leaf extracts are standardized to contain 24% flavone glycosides and 6% terpene lactones; the proprietary extract EGb 761 is the most widely studied preparation. Enteric-coated, phytosome, or liposome-encapsulated milk thistle forms can enhance silymarin absorption, while ginkgo extracts should be stored away from light and moisture to preserve potency.
They are not commonly sold as a dedicated pair, but both are occasionally found in combined liver-detox and cognitive-support formulas. Most commercial products that include them also contain other ingredients like phosphatidylcholine, artichoke extract, or B-complex vitamins.
Yes, you can take them together in most cases. There is no known direct interaction between these two herbs, so taking them at the same meal or with a glass of water is generally fine. However, if you take prescription drugs, I recommend keeping a 2-hour separation just in case.
Yes, it is safe for most healthy adults to take both on a daily basis. Just be sure to follow the dosing on the labels and watch for any unusual bleeding, bruising, or stomach discomfort. If you notice anything concerning, stop and talk to your doctor.
No specific gap is necessary—you can take them at the same time. If you choose to separate them, a 30-minute to 1-hour interval is more than enough.
No, they do not meaningfully compete for absorption. Silymarin is absorbed via passive diffusion and some intestinal transporters, while ginkgo's flavonoids and terpene lactones follow different uptake routes, so simultaneous intake is not a problem.
People on blood thinners, antiplatelet drugs, certain anticonvulsants, or SSRI antidepressants should talk to their prescriber before taking this combination. Pregnant and breastfeeding women, as well as anyone with liver or bile-duct problems, should also avoid it unless a doctor approves.
I recommend taking them with a meal, particularly one containing a little healthy fat, because food increases silymarin absorption and prevents gastrointestinal irritation from ginkgo. An empty stomach is fine in a pinch, but a meal is better for tolerability.
Reviewed by Caroline M. on April 11, 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.