Excess of hard fats causes problems. The fats in pork, beef, lamb, dairy and tropical nuts are natural, and not synthetic or damaged by processing. They have existed in nature for long time. Our body uses them in the structure of cell membranes, in fat deposits, and as fuel. They cause problems only when we consume more than we can use. Excess makes platelets stickier, interferes with insulin function, and interferes with the functions of essential fatty acids, the good stuff from fats.