What is the Difference Between Similar But Different Things, Terms, and Objects

What is the Difference between Saturated and Unsaturated Fats

Both saturated and unsaturated fats are found in our food which we daily consume.  Their consumption is important to make the body functioning. The joints of the body need grease to work properly just like a machine needs grease to work without friction. But abnormal consumption of fats could lead to health hazards.