Hydrogenated peptide, also known as nano-peptide, is a kind of nano-active peptide with the functions of promoting human absorption, providing cell nutrition, repairing cells and resisting oxidation. Widely used in cosmetics, health care products and other fields. The mechanism of action of water peptide is that it can penetrate the skin barrier better and be absorbed and utilized by skin cells through its smaller molecular weight and nano-scale size. Studies have shown that water peptide can enhance skin's moisturizing ability, promote collagen synthesis, improve skin elasticity and firmness, and reduce the appearance of fine lines and wrinkles. At the same time, water peptide also has antioxidant effect, which can neutralize free radicals and reduce the damage of oxidative stress to skin. It should be noted that the water peptide itself is not a scam. Fraud often stems from the behavior of some unscrupulous merchants, who may use the concept of water peptide to carry out false propaganda or pyramid schemes and other illegal acts in order to obtain improper benefits. Therefore, when purchasing products related to water peptides, we should choose formal channels to buy trusted brands or certified products to avoid being cheated.