Vitamin B3 or Niacin.

Niacin is also known as nicotinic acid and is part of the vitamin B complex group.  It is vital for the circulation of the blood and proper performance of the nervous system.  It helps metabolize proteins and carbohydrates.  Vitamin B3 is necessary for the diffusion of sex hormones, cartisone, thyroxin and insulin.
A diet lacking in [...]