I keep hearing this but as far as AHA and other credible sources that I have learned from, saturated fats are better be replaced with unsaturated:
https://www.heart.org/en/healthy-living/healthy-eating/eat-s...
https://www.heart.org/en/healthy-living/healthy-eating/eat-s...
Besides that, I'm wary of the saturated fats claim being true given that most of the studies were done on middle aged white men on a standard american diet. it didn't account for excessive calories and high levels of sugar in the diet. We've been eating animal products for thousands of years (inuits eating it exclusively) with little to no issues. Why would these suddenly now be a problem?