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).
Advice(noun) an opinion recommended or offered, as worthy to be followed; counsel. Advice(noun) deliberate consideration; knowledge. Advice(noun) information or notice given; intelligence; as, late advices from France; -- commonly in the plural. Advice(noun) counseling to perform a specific illegal act.