1, with the increase of age, the synthetic ability of fibroblasts decreased. If the skin lacks collagen, collagen fibers will combine and solidify, which will reduce intercellular mucopolysaccharides, and the skin will lose its softness, elasticity and luster, and become aging. At the same time, dermal fibers will break, fat will shrink, sweat glands and sebaceous glands will secrete less, resulting in a series of aging phenomena such as skin spots and wrinkles.
2. Collagen is extracted from animal skin. In addition to collagen, skin also contains proteoglycans such as hyaluronic acid and chondroitin sulfate, which contain a large number of polar groups and are moisturizing factors, so it has quite good moisturizing effect. When the relative humidity is 70%, it can still keep 45% of its own weight of water. Pure collagen solution can form a good water-retaining layer and supply all the water needed by the skin.
3. Edible collagen is usually white in appearance, soft in taste, light in taste and easy to digest. It can reduce triglycerides and cholesterol in the blood and increase some essential trace elements in the body to keep them in a relatively normal range. It is an ideal food for reducing blood fat. Collagen can help eliminate aluminum in the body, reduce the accumulation of aluminum in the body, reduce the harm of aluminum to the human body, and promote the growth of nails and hair to some extent.
4. Collagen is an important component in human bones, especially cartilage. Collagen is like a net full of holes in bones, which will firmly retain the calcium that will be lost. Without this net full of small holes, even if excessive calcium is added, it will be lost in vain;
Studies have shown that no amount of calcium supplements can prevent osteoporosis if collagen is lacking. Therefore, only by ingesting enough collagen that can bind calcium can calcium be quickly digested and absorbed in the body, and calcium can reach the bone and be quickly deposited.
Extended data
Collagen is a biopolymer, the main component of animal connective tissue, and the most abundant and widely distributed functional protein in mammals, accounting for 25% ~ 30% of the total in protein, and even more than 80% in some organisms.
The types of collagen isolated and identified from fish are: type I, which is widely distributed in dermis, bones, scales, swim bladder and muscle; type II and VII of cartilage and notochord; and type V of muscle. Type ⅰ collagen contained in fish skin and bone is the main collagen. In addition, type ⅹ ⅷ collagen was also found, while type ⅲ collagen, which is rich in mammals, has not been found in aquatic animals.
There are many types of collagen, and the common ones are type I, type II, type III, type V and type VII. Among them, only the price of type ⅰ collagen is acceptable; Other types of collagen, such as type Ⅲ, type Ⅳ and type Ⅴ collagen, are only prepared in research and are not suitable for mass production because of their high price.
Type ⅱ collagen is the main protein in articular cartilage, so it is a potential autoantigen. Oral administration can induce immune tolerance of T cells, thus inhibiting autoimmune diseases mediated by T cells. Collagen polypeptide is a product with high digestibility and molecular weight of about 2000 ~ 30000, which is made from collagen or gelatin by protease degradation. It does not have the gel properties of gelatin, and most of the collagen sold in the market is collagen polypeptide.
Collagen is widely used in food, medicine, tissue engineering, cosmetics and other fields because of its good biocompatibility, biodegradability and biological activity.
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