Shea butter is a skin care composition is very popular, often used as a reliable emollient and moisturizing agent. Shea butter can melt at the skin temperature, rapidly absorbed by the skin, replenish essential fatty acids for the skin, reduce the evaporation of water, and improve the moisture content in the skin. Studies have shown that milk wood oil can effectively prevent the loss of skin water. In one experiment, the volunteers were tested on the skin of volunteers' arm. The skin was dried by ethanol scrubbing and then dripped with shea butter. At last, it was found that the skin recovered moisture within two hours.