Unfortunately I can�t open the website above, but basically oxidation of cholesterol changes the molecules in a product and makes it damaging to the body. Oxidation can be prevented by avoiding air and heat hitting the cholesterol at the same time. For example, in the case of eggs, this means not breaking the yolk sac while cooking the egg. The cholesterol in an egg is in the yolk, and the yolk sac insulates the cholesterol from it. This effectively means that boiled eggs, poached eggs etc., are better for you than scrambled or omelettes.