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.
Education. Dermatology is one of the most highly competitive medical fields, and requires several years of education and training. The first step is an undergraduate degree from a four-year college, including pre-medical courses in biology, organic chemistry, physics, and chemistry.