Eat the fats humans have been eating for the longest. How long have we been eating each fat?? Animal Fats (2.5 million years) Butter (6000 yrs) Coconut Oil (1000's of yrs) Olive Oil (1000's of yrs) Avocado Oil (1000's of yrs) AVOID Soybean oil: ~100 years Corn oil: ~130 years Ca Show more