Protein restriction for disease prevention and treatment

A method for providing nutrients to a person to maintain or enhance health, comprising:

• providing nutrient material administrable to at least one of a person's gastrointestinal tract or intravascular space and comprising at least one of lipid or carbohydrate;
• wherein all of any protein in the material constitutes no more than 5 percent of a caloric content of the material;
• instructing that the material be administered to the person such that the person's bodily intake of all protein is restricted to less than 30 grams per day during a lower-protein time period of at least 48 hours;
• instructing that nutrition be administered to the person such that the person's bodily intake of carbohydrate constitutes at least 40 percent of the person's bodily intake of energy during the lower-protein period;
• and
• instructing that, during a higher-protein time period that is after the lower-protein period and is at least 24 hours and no more than 14 days, the person receives a higher daily bodily intake of protein than the person received during the lower-protein period.