IMO, I think that is more of a saturated fat issue, and only a subset of the population is like that. Others solve their health issues through eating a lot of red meat.
Yeah it's definitely more about saturated fat from animal sources.
A leaner cut like tenderloin is fine.
Ultimately you just want to keep the calories you get from saturated fats from animal sources to less than 10% of your daily calories. You can still enjoy a nice steak or burger every once in a while, but they shouldn't be a daily staple if health is a priority.
No, I mean for some, a high saturated fat diet can do amazing wonders. And for others, it causes horrible issues. The studies are not well segmented genetically and by body state since that is signficantly more expensive and genetics only got cheap in the past 10 years or so, so they wash out these large sub-population dynamics.
It's the sort of thing you can just experiment with and see for yourself.
Try eating the usual health-promoting diet high in fiber and low in saturated fats from animal sources, mostly whole foods, lots of fruits and veggies and legumes and whole grains, lean meats, etc.
After a few months, check your blood work.
Then reintroduce fattier cuts of meat into your diet and see what your numbers do after a few months.
