It's likely that cholesterol, produced in our cells, is a natural reparative substance that heals blood vessels damaged by modern 'poisons' such as processed foods.
Scientists have found that saturated fats and cholesterol work together to support the walls of our body's cells, imparting strength and stability to them. When large amounts of polyunsaturated fatty acids are consumed, they step in for the depleted saturated fatty acids in cell walls, but they're not a good substitute. So, the cell walls weaken, and cholesterol from the blood seeps into the tissues to offer added support. This is why blood-cholesterol levels are temporarily lowered when we consume polyunsaturated oils instead of saturated fats (Am J Clin Nutr, 1997; 66: 438-46).