Sodium nitrate is a type of salt used to preserve foods, particularly cured meat. It's added to cured meat to extend its shelf life by preventing rancidity and the growth of bacteria. The U.S. Environmental Protection Agency has set a legal limit for the concentration of nitrate allowed in food.
The 12-year process of becoming a dermatologist requires a significant commitment of the student's physical, mental, emotional and financial resources. It's only natural to wonder how large a reward waits at the end of this long road.
I think it is 4 years of + 4 years of medical school + 4 years of residency. You should major in dermatology in college. Eleven years if you want to earn a doctrate. That's a lot of dedication though. You'd have to finish high school, and go on to a med school, achieving a degree in Dermatology...