heart and liver damage

could anyone willing please give their opinion on the following:

In regard to fasting:

Once glycogen and fat stores are used up, the body turns amino acids from protein into glucose to supply the brain with energy. Then the fat stores are turned into ketones to supply brain fuel. The body essentially eats away at itself by taking protein from the heart, kidney, liver, and skin. Fasting can slow you down, according to George True. He has evidence from different nutritionists who say that fasting is unnecessary. Because we fast between meals and while sleeping it is not necessary to make ourselves feel weak and sick as well.

Can anyone honestly say or provide evidence that there are any long term effects of fasting? Tweet