A complete safety, timing, and dosage guide for combining Vitamin B1 (Thiamine) with PQQ (Pyrroloquinoline Quinone) (cellular health) — including how the two supplements interact, the best time of day to take each, and which populations should be careful.
Yes, you can safely add PQQ (pyrroloquinoline quinone) to your vitamin B1 (thiamine) supplement — no significant interaction has been reported.
Vitamin B1 and PQQ together are safe. These two supplements work through different pathways and do not interfere with each other. You can combine them as part of your daily routine without concern.
Thiamine is a water-soluble B vitamin that acts as a cofactor for enzymes involved in carbohydrate metabolism and ATP production. PQQ is a redox-active quinone that supports mitochondrial biogenesis and acts as an antioxidant. They do not share transport proteins or metabolic pathways, and neither one influences the other's absorption or enzyme function. Since both are water-soluble, they are absorbed in the upper gastrointestinal tract without competing for the same transporter. There is no evidence of cytochrome P450 involvement or receptor competition between these two compounds.
Take both supplements in the morning with food, preferably breakfast, to support daily energy metabolism. If you are using benfotiamine, it can be taken with a fat-containing meal, while PQQ disodium salt is fine with or without food. There is no need to space them apart; taking them together is convenient and safe. If you miss a dose, simply take it with your next meal, but do not double up. Always choose reputable brands that disclose the exact amounts and forms on the label.
Thiamine is commonly available as thiamine hydrochloride and as benfotiamine, a fat-soluble derivative with higher bioavailability. PQQ is typically sold as the disodium salt, which is stable and water-soluble. The form you choose does not change the lack of interaction between them, though benfotiamine may be better absorbed for some people.
Although not a classic pair, vitamin B1 and PQQ are occasionally combined in mitochondrial health supplements alongside CoQ10 and alpha-lipoic acid.
Yes, you can take them together. I often recommend combining them in the morning because they don't interfere with each other. You'll get the best benefit by taking them with a meal.
Yes, it is safe for most adults to combine these daily. The typical doses found in supplements are well tolerated. If you have any underlying health conditions, just run it by your doctor.
You do not need to wait at all. I usually suggest taking both at the same time to keep your regimen simple. There is no known absorption conflict between them.
No, they do not compete. Vitamin B1 and PQQ use different absorption routes and do not share transport proteins. You can take them together without worrying about lowered effectiveness.
Most adults can take them safely. If you are pregnant, nursing, or taking prescription medications, check with your healthcare provider before adding PQQ. Anyone with a history of liver disease should also get medical advice.
I usually recommend taking both with food to avoid any mild stomach upset and to support better absorption, especially for thiamine. PQQ is fine with or without food, so pairing it with a meal is a safe bet.
Reviewed by Caroline M. on April 8, 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.