Fleed eastpendery(at)live dot com HA content is about 15g in a human body. It plays an important role in human biologic activity. With the decrease of HA content in skin, the water retaining ability of the skin is weakened, the skin looks coarse and wrinkle. The decrease of HA in other apparatus will lead to arthritis, arteriosclerosis, plus disorder and brain atrophy. All in all the decrease of HA in human body will lead to premature senility. Oral HA can increase HA content in human body, supply deficiency of HA. By digesting and absorbing HA, skin can be made moist, smooth, soft and rich spring. Oral HA can defer crowd senility; prevent arthritis, arteriosclerosis, plus disorder and brain atrophy. Oral HA can make one full of beans and be rich in youth energy.