A complete safety, timing, and dosage guide for combining Vitamin B1 (Thiamine) with Ginkgo Biloba — 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 Vitamin B1 (Thiamine) with Ginkgo Biloba — no known interaction exists between them.
Vitamin B1 and Ginkgo Biloba together are safe to combine, as they follow independent absorption and metabolism pathways. Thiamine is a water-soluble B vitamin, while ginkgo's active compounds are handled by separate liver enzymes. No clinical evidence shows any negative interaction between these two supplements.
Thiamine is absorbed in the small intestine through specialized transporters called THTR-1 and THTR-2, and because it is water-soluble, any excess is excreted by the kidneys in urine. Ginkgo biloba's major bioactive compounds — flavonoids and terpenoids — are lipophilic and undergo metabolism in the liver through cytochrome P450 enzymes, especially CYP3A4, before being eliminated. These absorption and clearance pathways do not overlap with thiamine's, meaning neither substance influences the other's uptake or utilization. There is also no competition for plasma transport proteins or cellular binding sites, as thiamine circulates primarily as free thiamine or inside red blood cells while ginkgo components bind to albumin. In practical terms, the body processes each supplement independently, which is why combining them does not create any additive, synergistic, or antagonistic effects.
If you are already taking Vitamin B1 and want to add Ginkgo Biloba, simply take both together at breakfast with a glass of water and a balanced meal. There is no need to space them out, as they do not interfere with each other's absorption or action. If you prefer to separate them, taking thiamine in the morning and ginkgo with lunch is fine, but consistency matters more than timing. If you miss a dose, skip it and resume your normal schedule — never double up on the same day. For best absorption of ginkgo, take it with a meal that contains some fat, such as eggs, avocado, or olive oil.
Standard thiamine (thiamine HCl) and fat-soluble derivatives like benfotiamine both convert to active thiamine pyrophosphate in the body, and ginkgo does not influence this conversion. Ginkgo biloba extract is commonly standardized to 24% flavonoids and 6% terpenoids (often referred to as EGb 761), and this standardized form has no documented interaction with any thiamine formulation. Whether you take thiamine as a standalone supplement or as part of a B-complex, the safety profile with ginkgo remains unchanged.
This pair occasionally appears together in brain-health and memory-support supplements alongside vitamin B6, vitamin B12, and folic acid. In practice, I more often see thiamine co-supplemented with magnesium and alpha-lipoic acid for nerve health, and ginkgo is usually paired with ginseng or bacopa in cognitive stacks.
Yes, you can take them together. There is no known interaction that would affect absorption or effectiveness, and many people take them in combination without any issues. Taking them with a meal is a simple way to make this a regular habit.
It is safe to combine them every day, provided you are using standard doses and do not have any contraindications for ginkgo. I see no reason to avoid a daily combination, as thiamine is water-soluble and safe even at higher doses while ginkgo is well tolerated by most healthy adults. Just remain alert for any bruising or bleeding if you are also on blood-thinning medications.
You do not need to wait at all. Since these two supplements do not interact, you can take them simultaneously with a meal or at separate times without changing the outcome.
No, they do not compete. Vitamin B1 is absorbed through active transporters in the small intestine, while ginkgo's compounds are fat-soluble and absorbed via passive diffusion. Because they use entirely different pathways, there is no competition for uptake.
Most people can take this pair safely, but I would advise avoiding ginkgo if you are pregnant, breastfeeding, have a bleeding disorder, or are scheduled for surgery in the near future. If you have epilepsy or take anticonvulsant medications, talk to your doctor first because ginkgo can interfere with seizure control.
I recommend taking them with food. A meal helps buffer your stomach and may improve the absorption of ginkgo's fat-soluble components, while thiamine is fine either way. A breakfast containing some healthy fat is an ideal opportunity to take both together.
Reviewed by Caroline M. on April 2, 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.