Bullshit, Weston Price was a dentist and *he* did scientific research on animals, having different groups, one control group feeding them nutrient deficient foods. For the lack of vitamin A study they were born without eyes and other horrible things. You didn't obviously read his book. Same goes for the Pottenger story.
And low fat diets are especially bad, take Dr. Mercola's Fat for fuel for example. I'm sorry but I've dealt with these clowns who promote vegan and raw diets. They banned me from their facebook posts because I was investigating nutritional value, calculating them on cronometer.com and telling them the truth. I tried eating raw and vegan and I was the sickest of all times. The problem lies elsewhere: cooking. Eating cooked meat is a huge tax on your digestive system therefore you should eat it raw and do a parasite cleanse often (herbal or enzyme). But the problem is that our way of life is so bad and our immune system so compromised due to all the vaccines and nutrition that it can be dangerous to eat raw meat. While it is obviously the most natural. Thanks fake science for making us all sick.