This blog presents an idea that, based on current research, appears likely true and may save your life:
Taking intermittent “protein breaks,” when you eat very little or no protein for 2-4 consecutive days while eating plenty of carbohydrate, can slow aging and prevent, delay, or reverse — at least partially — many diseases including obesity, type 2 diabetes, autoimmune disorders, and brain diseases such as Alzheimer’s and Parkinson’s.
If you take protein breaks, you must follow each by a period of eating adequate amounts of protein.
This hypothesis awaits confirmation by randomized human clinical trials, but is consistent with prior studies in humans, other animals, and living cells.
Because no clinical trial has yet been done to establish the efficacy of protein breaks in humans, I cannot recommend them. But I recommend you consider them with your doctor.