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).
Definition of advise. advised. ; advising. transitive verb. 1a : to give (someone) a recommendation about what should be done : to give advice to Her doctor advised her to try a drier climate.b : caution, warn advise them of the consequencesc : recommend advise prudence. 2 : to give information or notice to : inform advise them of their rights.