“While the low carb, ketogenic diet did not lower total LDL cholesterol, it did result in a shift from small, dense LDL to large, buoyant LDL, which could lower cardiovascular disease risk.”

Low carbs diet also increase HDL.

Here is an article that goes into a little detail : https://www.ruled.me/the-ketogenic-diet-and-cholesterol/

Diatary and Blood collesterol are not casually linked as many erroniously assume. Easy mistake.

I don't want to get into a heated nutrition debate because it's such a mess divisive landscape, but wanted to share the other side, which looks compelling: https://nutritionfacts.org/2016/03/22/the-effects-of-dietary... And another interesting piece of science pointing at causation rather than correlation regarding LDL and CAD: https://nutritionfacts.org/video/how-do-we-know-that-cholest...