Good post.
I just skimmed the above link, about short chain fatty acides (SCFA)
Also, ,I recalled something I read about epigenetics. People thought that only DNA was passed down through sperm and egg, not the epigenetic modifications. Some experiments showed inheritance through the epigenetic changes.
Dr. Cannon pointed to an autism study published in 2012 in Microbial Ecology in Health and Disease that showed the epigenetic nature of autism. Rats were given SCFAs from a subject with autism.
The rats displayed abnormal motor movements, repetitive behavior, cognitive deficits, impaired social interactions, and other traits common in autism. The brain tissue of treated rats also showed neurochemical changes—such as innate neuroinflammation, increased oxidative stress, and glutathione depletion—consistent in patients with ASD.