If you suggest that the chemicals found in drugs that change behaviors and brain function, also found in food are doing the same things albeit at lower potency, they get all defensive...... I think on some level they know, and dont want to have to take that hard critically necessary self reflection on what it is they eat every day. Instead they want to pretend that the junk food, the drugs, the overindulgence has no consequence. Go on thinking that drinking nuclear batery acid (soda) wont make you retarded, lead to diabeetus, alzheimers and other neurodegenerative conditions. Go on thinking that the soy is safe for you. Go on eat some more HFC$ and other plant oils. Go on thinking that exposing yourself to absolutely incomprehensible ammounts of hormone dissrupting toxins that are destroying even the minds of normal weight people is healthy for you. Go on continue sitting on MMORPG's all day like the bovine creature you are, pretend that neurogenesis doesnt exist, and that being obese means you  value "intelligence" over the "meatheads".... Happy faturday.