Nose sniffing method: no irritating smell, with a faint fishy smell.
Visual inspection method: Soluble in proper amount of solvent, it can be quickly dissolved at room temperature without precipitation.
Tasting method: the taste is light.
Selection method: high-quality fish collagen peptide is strictly controlled from raw material selection to production. Please select a brand product.
Skin test method: apply a small amount of liquid to the back of hand or face, and see if it is completely absorbed after a while, and whether there are white crystals or foreign body residues on the surface.
Extended data:
Cosmetic application of collagen;
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, resulting in aging. At the same time, dermal fibers will break, fat will shrink, sweat glands and sebaceous glands will decrease, resulting in a series of aging phenomena such as skin spots and wrinkles.
When used as an active substance in cosmetics, the latter can spread to the deep skin, and the tyrosine contained in it competes with the tyrosine in the skin and combines with the catalytic center of tyrosinase, thus inhibiting the production of melanin, enhancing the activity of collagen in the skin, maintaining the integrity of moisture and fiber structure in the stratum corneum and promoting the metabolism of skin tissue.
It has good moisturizing, wrinkle-removing and beauty-caring effects on the skin. As early as the early 1970s, the United States took the lead in introducing bovine collagen for injection to remove spots, wrinkles and scars.
Baidu encyclopedia-collagen