As we age, our skin begins to show signs of aging: including the reduction of collagen, mucopolysaccharides, and elastin in our skin. The blood vessels that supply our skin nutrients in the circulation begin to wretched, blood vessels. The elasticity of the wall began to decrease, and the epidermis of the skin began to gradually swell and turn yellow; subcutaneous fat began to reduce wrinkles, and chloasma and senile plaques appeared. The main reason for these phenomena is the increasing number of free radicals. Therefore, eliminating excessive free radicals in the human body is an important way to solve the problem of skin aging.
1.1 Anti-aging plant extracts
1.1.1 Grape seed extract
Grape seed extract mainly includes proanthocyanidins, grape seed oil, resveratrol, vitamins, tannins, etc. These ingredients all have a cosmetic health effect. Proanthocyanidins have strong antioxidant capacity, and its antioxidant effect is 50 times that of VE and 20 times that of VC. Grape seed proanthocyanidin extract has 85% bioavailability in human body. Proanthocyanidins can inhibit the formation of peroxides caused by ultraviolet light; can also inhibit Maillard reaction, inhibit the formation of lipofuscin and senile plaques; also inhibit the activity of tyrosinase, which will be melanin The ruthenium structure is reduced to a phenolic structure, which causes the pigment to fade.
1.1.2 Tea extract
The main chemical component of tea extract  is tea polyphenols. Tea polyphenols, also known as tea tannins, are a general term for a polyhydroxyphenolic compound contained in tea, referred to as TP. Its main components are catechins (flavans), flavonoids, flavonols, anthocyanins, phenolic acids, phenolic acids and polymeric phenols. Tea polyphenols are highly resistant to oxidation and are a natural antioxidant that blocks UV rays and removes UV-induced free radicals, thereby protecting the normal function of melanocytes.
1.1.3 Rhodiola extract
The main chemical constituents of Rhodiola rosea extract are Rhodiola and flavonoids. Rhodiola rosea not only can significantly enhance the skin's ability to resist ionizing radiation, but also prevent damage to lipids and cell membranes caused by various radiation (α, β, γ) radiation, improve heart and lung function, resist fatigue, protect the body's immune system, and exert resistance. Aging effect. Flavonoids have superior superoxide dismutase (SOD) activity and scavenge free radicals, repair damaged skin, resist lipid oxidation and anti-aging. Rhodiola rosea extract has the ability to resist oxidation and inhibit tyrosinase in vitro, and can be used as an additive to delay aging and whitening cosmetics.