If one eats any animal product (e.g. meat, cheese, butter), one will encounter oxidized cholesterol. Meat cannot be held in a butcher case, cooked, canned or processed in any way without oxidizing cholesterol. Milk cannot be pasteurized nor cheese allowed to age without forming oxidized cholesterol. Cholesterol is part of each muscle cell wall and is found in all animal fats. Leanness is not the issue. The highest cholesterol food listed in USDA Handbooks is turkey. It is just the nature of the beast that it contains more cholesterol in its cell membranes than most other animals.