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).
1. 'advice'. Advice. is a noun. If you give someone advice, you tell them what you think they should do. Take my advice  stay away from him! She promised to follow his advice. Advice is an uncountable noun. Don't talk about ' advices ' or ' an advice '. However, you can talk about a piece of advice.