Heart attacks - everybody also started smoking like mad and the industrial revolution was in full swing, at the same time.
I think it was the light bulb/extra light at night. no wait, it was plastics! no, it was computers.
Hydrogenated vegetable oils are crap. Oils high in polyunsaturates aren't good either. Soybean oil is crap
Get N-3s fatty acids, get plenty of monounsaturated fats. Don't heat them if you can avoid it.
Read this, it's been around forever
https://www.amazon.com/Fats-That-Heal-Kill-Cholesterol/dp/09...
PubMed > YouTube. 2016 - "Olive Oil and the Hallmarks of Aging" https://pubmed.ncbi.nlm.nih.gov/26840281/
In Ithaca though we have a population of hypochondriacs who are notoriously left wing.
Alternative ideas about the healthiness of fats have circulated a long time
https://www.amazon.com/Fats-That-Heal-Kill-Cholesterol/dp/09...
is the first one I saw against ‘seed oils’, certainly alternative ideas about the healthiness of cholesterol and saturated fats have been circulating a long time. What is different is the polarization of the post-COVID environment but the polarization is such that you find people who don’t think we are post COVID.