I like this article: skim milk is produced by oxidizing the cholesterol in it. In animal studies oxidized cholesterol causes heart disease and is carcinogenic. Also weight loss was better with full-fat dairy low-fat dairy was associated with overweight, obese children.
Full-fat dairy has the large, fluffy LDL (pattern A) which is NOT implicated in heart disease (Gary Taubes - Why We Get Fat, Good Calories/Bad Calories and Fathead movie). Pattern B is the small, dense LDL associated with heart disease.You can only have Pattern A or B NOT both is my understanding.
Pattern A: low triglycerides, low VLDL, large fluffy LDL, high HDL - all heart healthy/protective
Pattern B: high triglycerides, high VLDL, small dense LDL, low HDL - all heart disease producing
A lot of labs/doctors don't distinguish between large fluffy vs. small dense types of LDL which is why I look at triglycerides and HDL - a much better indicator. Also you will either fit into Pattern A or B so I think you can figure out which LDL (small-dense dangerous ones vs. large fluffy benign) you are producing by levels of HDL and triglycerides.
There's more on insulin, glucagon, VLDL and the like in this article. A bit technical, but still a good read: