Complex sentence: Pasteurization, homogenization, and the use of GMOs and pesticides are all considered poisonous to humans--as is the consumption of milk from cows that are treated poorly, and consuming cold milk.
Split into simpler sentences: Pasteurization, homogenization, and the use of GMOs and pesticides are all poisonous to humans. As is the consumption of milk from cows that are treated poorly, and consuming cold milk.