On the Use of Expired Glycolic Acid
The world has something called glycolic acid, which is widely used in skin care and other things. However, people are often confused, can it still be used after it has expired?

The property of Glycolic Acid is acidic, it can exfoliate, promote skin metabolism, and make skin rejuvenated. When it has not expired, it can be used in the right way, and the effect is quite good. It can make the skin smooth and shiny, and it is also beneficial to acne, spots, etc.

However, when it expires glycolic acid, the chemical structure in it may change due to time changes. Years pass, or cause components to decompose and deteriorate. In this case, its acidity or different from before, the original effect is reduced, and even worse, it is used to harm the skin. If expired glycolic acid is used, it may cause skin allergies, redness, swelling, and itching, damage the skin's barrier, and reduce the skin's resistance to external evil. In light cases, the skin will be uncomfortable for several days; in severe cases, it will be difficult to heal and cause endless harm.

Therefore, for the sake of skin health, do not use expired glycolic acid. Use things to check their expiration date, expired things, if you feel it is a pity, you should not use them rashly. Only by abiding by this principle can you protect the skin's longevity, enjoy the benefits of skin care, and avoid its harm.