Gelatin (Gelatin), there is no fixed structure and relative molecular weight, by the animal skin, bone, muscle membrane, muscle charm and other connective tissues in the collagen part of the degradation of white or yellowish, semi-transparent, slightly glossy flakes or powder particles; is a colorless, tasteless, non-volatile, transparent and hard amorphous substance, soluble in hot water, insoluble in cold water, but can slowly absorb water expansion softening, gelatin Gelatin can absorb water equivalent to 5-10 times its weight. Gelatin is one of the very important natural biopolymers and has been widely used in the food, pharmaceutical and chemical industries. Gelatin is a hydrolyzed product of collagen, a fat-free high protein, and does not contain cholesterol, is a natural nutritional food thickener. It is a natural and nutritious food thickener. It is neither fattening nor causes a loss of physical strength when consumed. Gelatin is also a strong protective colloid with strong emulsifying power, which can inhibit the cohesion of proteins such as milk and soymilk due to gastric acid after entering the stomach, thus facilitating the digestion of food. Containing 18 kinds of essential amino acids, it is widely used in food industry as excipient, thickening agent and clarifying agent for beer, which is a widely used additive in food industry. But it is not the more the better, the disadvantages are as follows:

First of all, edible gelatin a large molecule protein, due to the molecule is too much, the human body is generally rarely absorbed. Although gelatin belongs to the food additives, no harm to the human body, but there is not much nutrition, and we all know that we want to jelly, fudge and other foods are not easy to be digested by the human body, if consumed in excess may cause indigestion.

Secondly, according to the national gelatin production norms, leather glue raw materials must come from non-infected areas, fresh frozen leather, but at present many unscrupulous manufacturers have been using tanned leather and scraps of the production of gelatin, due to the use of chromium-containing chemicals in the tanning process of the leather, resulting in chromium exceeded the standard, while chromium is harmful to the human body, easy to cause cancer.

Finally, because gelatin contains a certain amount of aluminum, and brain tissue has an affinity for aluminum, too much aluminum deposition in brain tissue, can make people memory loss, mental retardation, slow action, and promote aging. It has been reported that aluminum salts may cause memory loss. A private research group in Australia says that the widespread use of aluminum salts to purify water may lead to brain damage and severe memory loss, a characteristic symptom of Alzheimer's disease. Researchers' experiments on rats showed that traces of aluminum mixed in drinking water entered the rats' brains and built up there, reaching measurable levels in their brains after they were given a glass of water treated with aluminum salts. Consuming excessive amounts of gelatin therefore has the potential to increase the risk of Alzheimer's disease.