Naw, it’s one of the early numbered B Vits, B1, or 2 I can’t remember. It, in some dudes, can cause those nasty “vitamin burps”, and nausea. Maybe Pantothenic acid , or B-5. The nasty taste is made far worse by the vitamin aging, like from heat.
It is almost certainly not B6 or B12.
So here is what to do- get a small cheap jar of each B-Vitamin (see link below). Take one, wait an hour. Repeat until you find that nasty one. Then, don’t take that one any more, find a couple foods rich on it and make sure you eat some.
**Harmonious Discord **“B is stored in the body and you can overdose on it. It effectively can poison you.” False, that is Vit A and D. Mostly A.
(Of course, you can likely overdose on anything but the B-vits are NOT stored in the body. A constant long term overdose of B6 @ 100 times the RDA can cause temporary nerve damage.)