Some people with liver disease must eat a special diet. This diet helps the liver function and protects it from working too hard. Proteins normally help the body repair tissue. They also prevent fatty buildup and damage to the liver cells.
Advise is a verb, and advice is a noun. So advice is what is given, while the act of giving advice is called advising (or to advise).
An advice column is a column traditionally presented in a magazine or newspaper, though it can also be delivered through other news media, such as the internet and broadcast news media. The advice column format is question and answer: a (usually anonymous) reader writes to the media outlet with a problem in the form of a question, and the media outlet provides an answer or response. The responses are written by an advice columnist (colloquially known in British English as an agony aunt, or agony uncle if the columnist is male).