What is the key ingredient in all lotions? Oil. Some type of petroleum or natural based grease. This is because the skin absorbs and uses it for its own advantage and does it quickly. Now, it isn’t ideal that we put whatever random product we find on our bodies – if we absorb the oil what about the rest of materials in the lotion? You bet. Our body brings it in and does what it can with it – good or bad. Using this same method of transfer, essential oils are placed on the body and allowed to absorb in. The great difference is that the oils are pure plant oil rather than a hideous list of man-made chemicals.