Bs across the board
Niacin, same deal: an essential nutrient that has to be added back into the mix. Niacin is also known as vitamin B3, and without it, you’ll quickly develop weird weaknesses: anemia, headaches, dizziness, nausea, that kind of thing. Good! Add it back in, please.
Thiamine mononitrate is also an additive; it’s a version of thiamin, otherwise known as vitamin B1, though not a naturally occurring one. Thiamin is another nutrient kind of like niacin; it’s not that taking more of it makes you healthier, it’s that without it, you develop serious health problems. Thiamin deficiencies tend to affect the nervous and cardiovascular system.