Hyaluronic acid, scientific name hyaluronic acid, is a multifunctional matrix. It is widely distributed in all parts of the human body, and the skin contains a lot of hyaluronic acid. The aging process of human skin also changes with the change of hyaluronic acid content and human aging. Hyaluronic acid can improve the nutritional metabolism of human skin, make skin soft and smooth, eliminate wrinkles, increase skin elasticity and prevent aging. Moreover, hyaluronic acid is a good transdermal absorption enhancer. Hyaluronic acid molecules can carry more than 500 times of water, so it is widely used in skin care products and cosmetics. In medical beauty, hyaluronic acid (HA) is injected into human facial tissue as a tissue filler, which plays a supporting and filling role, thus achieving the purpose of wrinkle removal, shaping and increasing skin elasticity. ?

Second, is it safe to inject hyaluronic acid?

After pure and uncrosslinked hyaluronic acid is injected into human body, the tissue reaction is small, the degradation speed is fast and the safety is good, but the effect of increasing tissue volume cannot be maintained for a long time. After injecting hyaluronic acid into the face, symptoms such as local pain, swelling and blood stasis may occur, and occasionally there are adverse reactions such as edema, redness, heat sensation and local heavy pressure. ?

In addition, the safety and effectiveness of products are also related to the quality of injected products, injection dosage, injection frequency, injection site, injection depth, injection method, hygiene during injection and individual differences. If there is communication between superficial facial blood vessels, ophthalmic artery and intracranial blood vessels, hyaluronic acid will enter arteriole reflux if injected improperly, and if not treated in time, it may block the ophthalmic artery and cerebrovascular of patients, leading to complications such as blindness and cerebral infarction. ?

Third, how to identify true and false hyaluronic acid products?

At present, the inferior hyaluronic acid sold in the market is mostly sold in some beauty salons, barber shops and nail shops without relevant qualifications. Illegal consumers use low prices to attract some consumers with low spending power but desire to inject, which leads to many consumers being cheated and some unnecessary consequences. Therefore, it is very important to identify the authenticity of products. The specific method is as follows:

1. Drop a drop of product on white paper. If the oil stains soak the white paper and spread, it means that the substance is not hyaluronic acid, but silica gel oil or paraffin oil. ?

2. Drop a drop of product in the palm of your left hand, and then touch the liquid repeatedly with the fingertip of your right hand. After a few minutes, after most of the water evaporates, if you can observe with the naked eye that there are sandy crystal particles in the remaining residue, and there are no other substances in the residue except this particle, it can basically be confirmed to be true hyaluronic acid.