The amount of absolute nonsense that people believe in this country is scary. 99% of things online are nothing but propaganda with absolutely no medical evidence or it is based off completely biased medical studies used to manipulate you.
It's sort of like the antibiotic free chicken, non GMO products, grain free dog food, and so on and so on. All of these things are nothing but sales tactics and people that buy into them truly have zero clue how the USDA works or how your food is grown. It's scary how easily people are manipulated based on anything they see on TV or read on facebook. Yes there are dogs that are allergic to grains, yes there are people with medical conditions that require certain diets, but the average pet or person does not fall into any of these catagories.
There are literally cases of measles in this country now, lots of them in fact. People are incredibly stupid.