Vit D is an important issue in Austism, and your point about the requirement for D3 in serotonin production is not to be ignored. But I don't believe it plays as a role as the paper suggests. Vagal macrophage

addition of fiber is a good thing here. You're going to need it to help your liver eliminate the bile that sequesters this endocrine modifying chemical laden toxin (phenylketonuric) containing non refreshing

the process you are looking for for is called autophagy. It is where your immune system, in the form of phagocytes, search out and consume inefficient/ dying/ damaged cells and harvest their nutrients

r u pho real? if the world is over populated by a virus, are you going to be the next cell to initiate apoptosis to lower the viral load?? Or are you one of these types that thinks the virus is caused