Squalane, a

Squalane, a natural oil found in the livers of sharks, is used to make cosmetics and personal care products such as deodorants, skincare and sun creams. Another shark oil known as squalene is used as an adjuvant to increase efficacy of some vaccines. The sourcing of these two ingredients threatens shark populations, and alternatives have been derived from olive oil but the availability and price of that supply fluctuates depending on weather-dependent harvests.