A natural organic compound we obtain from olive oil (not from shark liver oil). All plants and animals produce squalene as a biochemical intermediate, including humans.  It penetrates pores and improves skin at the cellular level without clogging them as bacteria, dead cells and hardened oils can.  Further, according to research(*1) published by the NIH, squalene has anti-inflammatory properties that can reduce redness and swelling in treating inflammatory acne, eczema, psoriasis, dermatitis, and rosacea