Everyone wants to be praised as energetic, who wants to reverse the traces of time and who wants to have firm and elastic skin. Since when, "collagen on the face" has been used as an adjective to praise people's skin for being moist and elastic. Collagen enjoys the reputation of "bone in bone, meat in meat, skin in skin" because of its functions of supporting bones, strengthening muscles, moisturizing, whitening and removing spots. To reverse skin aging, the secret of vitamin factor is to supplement collagen. Vitamin factor skin care experts say that at the same or similar age stage, women lose collagen faster than men, and the physical appearance of the network structure formed by collagen in men's skin is younger. In addition, the physiological characteristics of women also affect that women consume more collagen than men. For example, after menstruation, the endometrium falls off and the damaged uterus needs to be repaired. The endometrium is composed of collagen fibers and needs a lot of collagen. Also, female childbirth will also damage the uterus and consume more collagen. This is also the reason why women after the age of 30 will look more aging than men of the same age.