0 an oily substance found naturally in human skin cells and in the liver (= an organ that cleans the blood) of sharks (= large fish with sharp teeth). It is one of the substances used to make moisturiser (= a substance put on the skin to stop it becoming dry):
Amaranth oil, high in squalene and unsaturated fatty acids, is used in the food and cosmetic industries.
Squalene is a long carbon molecule of 30 carbon atoms and it has six unsaturated carbon bonds.
Squalene occurs naturally in the human body but can be harmful when injected with a vaccine.
