Eat real food, as close to nature as possible. It’s what we do to food that is a problem — processing, refining, reducing and altering in general. Forget about reduced fat and skim milk. The less processing the better. If you’re going to eat fat, choose good quality and go for full-fat. Eat avocados, use olive oil or coconut oil (yes coconut oil is healthy) in cooking, have nuts, wild salmon, grass-fed butter, and pastured grass-fed beef.
I think that reduced-fat foods, particularly skim milk, nonfat yogurt, etc. are a slippery slope. When you remove the fat content from one cup of milk, you lose a significant volume, which means it’s replaced with milk that has a higher concentration of sugar to fat ratio. It’s not the fat in milk that makes us fat. It’s the sugar.