There's a difference between "being around" and "everyone routinely consumes them". American diets change drastically in the middle of the 20th century.
https://www.washingtonpost.com/news/wonk/wp/2015/06/12/look-...
e.g.
The average American woman weighs 166.2 pounds, according to the Centers for Disease Control and Prevention. As reddit recently pointed out, that's almost exactly as much as the average American man weighed in the early 1960s.
Men, you're not looking too hot in this scenario either. Over the same time period you gained nearly 30 pounds, from 166.3 in the 60s to 195.5 today. Doing the same comparison as above, today's American man weighs almost as much as 1.5 American women from the 1960s.
This is NOT a subtle change! And it has severe consequences.
I think it's clearly due to diet and the "hidden" choices in the food supply, but if anyone has contrary information I'm interested. It's a tremendous change that needs an explanation.