Yo dog, I heard you like hydroxyl groups so we put some hydroxyl groups on your vitamins so you can adds hydroxyls while you hydroxyl. Sorry I just had to do that.
Anyways, this is Pyridoxine, also known as Vitamin B6. Vitamins are classes of chemicals that the body needs to function normally. Typically they help in the production of proteins and the immune system, but others have a more specialized function like B6. Pyridoxine helps in the production of red blood cells and can have a role in the immune system as well. Its also required by the body to make norepinephrine, serotonin, dopamine, and epinephrine as its a precursor to a cofactor required by an enzyme for the synthesis of those neurotransmitters.
However, too much of a good thing can just be as bad as too little. Too much B6 can cause you to lose the feeling in your legs and arms. Yea that sounds like fun. Oh even better cause you to stumble around as your nerves won’t be working right. So please, don’t chug that bottle of vitamins.