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.
Following a residency, a doctor may choose to take additional fellowships in order to become a dermatologist in a specialty field. These fellowships typically last one to two years, and aim to train an already accomplished doctor in advanced techniques, such as cosmetic surgery or the removal of skin cancers. With fellowships, the time it takes to become a dermatologist may stretch up to 15 years. Despite the longer time commitment, fellowships are often well-paid positions that can help establish a doctor at the cutting edge of his or her field.