Peter Attia prefers LDL particle number below 1000 nmol/L for preventing the most common cause of death.

“I generally take a harder line on triglycerides than is typically given so the typical reference range on triglyceride is less than 150 milligrams per deciliter apologize I don't know what that is in millimolar for people who are outside of the United States I generally like to see triglycerides below 100 and if we're really gonna get fancy I'd like to see triglycerides lower than HDL cholesterol when both are measured in milligrams per deciliter so again that's probably a bit more of a stringent you know sort of level that I would put on things but that that's sort of the first place I think about it secondly looking at the LDL particle number which is measured in animal per liter just morally and philosophically I feel like that number ought to be below a thousand animal per liter which is about the 20th percentile of the population and the reason I feel that way is you know heart disease and atherosclerosis are the most ubiquitous causes of death so to be average on the disease that is the most common strikes me as just backwards mathematics”