The high content of collagen in pigskin is helpful to improve human skin. Nutrition experts say this is a misunderstanding of nutrition. In fact, the human body cannot directly absorb protein. In other words, even if high-purity collagen or pigskin is taken orally, when collagen enters the human body, it will be decomposed again under the action of amino acids to synthesize a new protein. Therefore, the collagen eaten in the stomach may recombine into a new protein pigskin, instead of beauty beauty. But eating pigskin often is very helpful to increase the fullness and firmness of the skin. Moreover, pigskin and chicken skin are nutritious and good for our health.