Soaps and most other skin cleaning agents strip the skin of the sebum that skin glands produce to lubricate the skin and protect it from drying out. Every time we wash our face and hands, even with plain water, we’re removing a protective layer of sebum along with dust and grime. The cold and dry air in winter and air-conditioned interiors dry out our skin at a faster rate than our skin glands replenish the oil supply.
Being a waxy substance, Jojoba oil can seal in the moisture and create an effective barrier to external elements. It is so structurally close to the secretion of the sebaceous glands in the skin that it is readily accepted and tolerated.