A complete safety, timing, and dosage guide for combining Chamomile with Vitamin B1 (Thiamine) — 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 chamomile together — no known interaction exists, and they affect the body through different pathways. Enjoy both as part of your daily routine.
Vitamin B1 (Thiamine) and chamomile together are neutral, so adding chamomile tea to your daily routine will not interfere with your thiamine absorption or activity. No shared receptors, transporters, or metabolic pathways are involved, making this combination safe for most adults.
Thiamine is a water-soluble vitamin that is absorbed primarily in the proximal small intestine through specific thiamine transporters (THTR-1 and THTR-2) and then converted to its active coenzyme form, thiamine diphosphate. Chamomile's primary active compounds — apigenin, bisabolol, and matricin — are lipophilic flavonoids and terpenoids that are absorbed via passive diffusion and processed through phase II conjugation in the liver. There is no evidence that chamomile's polyphenols or terpenoids inhibit or induce the thiamine transporters, nor do they compete for the same carrier proteins. Because thiamine works as a cofactor in carbohydrate metabolism and chamomile acts mainly through GABA-A receptor modulation and anti-inflammatory pathways, the biological mechanisms do not overlap. Therefore, the combination is pharmacologically inert at typical supplement and tea doses.
If you take both daily, take thiamine with breakfast and water, then drink chamomile tea later in the day or in the evening for relaxation. No specific spacing is required, so you can also take them together at a meal if that is easier. If you use chamomile extract capsules, you can take them with thiamine at the same time without issue. For optimal thiamine absorption, avoid taking it with excessive amounts of alcohol or very high doses of tannic tea, though ordinary chamomile tea is fine. The most important habit is consistency — take thiamine most days and use chamomile as needed for its calming effect.
Thiamine comes as thiamine HCl, thiamine mononitrate, and the fat-soluble derivative benfotiamine. Benfotiamine is absorbed better than regular thiamine in some contexts, but this does not change its interaction profile with chamomile. Chamomile is commonly consumed as a hot-water infusion (tea), in capsules containing dried herb, or as a liquid extract; all forms are mild, and none of them affect thiamine absorption. However, concentrated chamomile extracts may contain higher amounts of apigenin than tea, so if you are using an extract, you should still expect no interaction with thiamine.
Thiamine is a standard component of B-complex and energy-support formulas, often paired with magnesium and vitamin B12, while chamomile appears in calming sleep teas alongside valerian root, lemon balm, and magnesium. The combination of thiamine and chamomile is not commonly sold in one commercial product, but they are frequently used together by people who take a morning B-complex and an evening herbal tea.
Yes, you can take them at the same time. I do not recommend any separation because there is no known interaction between thiamine and chamomile. A cup of chamomile tea alongside a morning meal with your thiamine supplement is perfectly fine.
Yes, it is safe to combine these two daily. Thiamine is a water-soluble vitamin that your body excretes when in excess, and chamomile is a gentle herb when consumed as tea or a standard extract. There is no evidence that daily use of both leads to adverse effects.
You do not need to wait at all. If you prefer to be extra cautious, you can wait 30 minutes, but this is not necessary because there is no absorption competition between thiamine and chamomile.
No, they do not compete for absorption. Thiamine uses specific thiamine transporters in the small intestine, while chamomile's flavonoids and terpenoids are absorbed through passive diffusion and different metabolic pathways. There is no shared transport system.
Most adults can take them together safely. If you are allergic to chamomile or related plants, are pregnant, or take blood-thinning medications, you should check with your doctor before using chamomile regularly, but your thiamine supplement can continue.
I recommend taking thiamine with food and water because it is absorbed easily alongside a meal and can help prevent mild stomach upset. Chamomile tea can be taken with or without food, but I generally suggest sipping it in the evening, either before or after dinner.
Reviewed by Caroline M. on April 22, 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.