As per AV's research, the most cleansing and detoxifying foods tend to be vegetable foods, including vegetable juice, fruits, bland fruits, and unheated raw vegetable fats such as stone pressed olive oil or fresh home squeezed coconut cream. Whereas animal foods are used more for nourishment, protection and rebuilding.
This explains why raw vegans tend to be very clean and toxin free, however their bodies break down because they just don't have the nutrients necessary to build healthy bodies, or to protect their organs when the toxins are being expelled from the body. This is also why raw vegans tend to be super skinny, generally weak, and their skins look dry and are more likely to have plenty of wrinkles earlier in life.
This is also why AV recommended a diet heavy in both animal and vegetable foods for the modern human who lives in civilized society, we are so full of toxins, we need to cleanse far more than our wild ancestors would've. They really didn't need much if any vegetable foods. It's also why he recommended to progressively lower the intake of vegetable foods as one continues to be on this lifestyle for many years and becomes cleaner. He also recommended that ex- raw vegans limit their intake of vegetable juice and other vegetable foods, because they've already detoxified far more than their bodies could handle, so now they need to slow down, heal, and rebuild.
