Diet is, as you might expect, a key strategy that can make or break your health (and your tolerance for stress). The Paleo diet, which has gained popularity over the years, essentially strives to mimic the diet our ancestors ate during the Paleolithic era. But we don't actually have to go that far back. Merely turning back the dial about 150 years will do. That's when industrial food processing began. That's also when industrial processed seed oils (aka, vegetable oils) were introduced as a replacement to healthy animal fats like lard and tallow, which had previously been the norm.