Guide to the use of AHA, BHA and glycolic acid

The nourishment of the skin, the application of chemical acids is becoming more and more widespread, among which AHA, BHA and glycolic acid have different effects, and they also need to be used.

AHA, that is, α coefficient hydroxy acid, originates from natural fruit acids, such as glycolic acid from sugar cane, tartaric acid from grapes, etc. Its mild nature can exfoliate the skin, refresh the skin, promote metabolism, make the skin smooth and delicate, light spots and gloss. However, AHA has a certain irritation. For thin skin or sensitive skin, it should be diluted at the beginning and gradually increased in concentration. And daytime use needs to be careful to prevent sun exposure, because it makes the skin more sensitive to light.

For BHA, beta hydroxy acid, salicylic acid is used. Its fat solubility is good, it can enter pores, clear oil, inhibit Propionibacterium acne, is good at treating acne and acne, and can also soften the skin. However, BHA is also irritating, and sensitive skin must be tested before use. When using, start from a low concentration and adjust it according to skin tolerance.

Glycolic acid belongs to the AHA class, with small molecules and strong penetration. It can quickly dissolve interkeratinic lipids, promote exfoliation, change skin texture, and lighten wrinkles. However, because of its strong penetration, it is also highly irritating. Sensitive skin and beginners, start from low concentration and short-term use, and stop using if there is any discomfort.

As for the combination of the three, caution is required. Because they are all exfoliating, the stimulation is greatly increased when used together. Those with strong skin tolerance can try it at a low concentration first, step by step. Use gentle cleansing to cleanse the skin first. After drying, apply low-concentration AHA or glycolic acid first, and then apply BHA when dry. When using it, closely observe the skin's reactions, such as redness, tingling, and peeling, and stop immediately and take care of it.

In short, although AHA, BHA, and glycolic acid are good skin care agents, they need to know the characteristics of the skin when used, and follow the usage method to avoid the risk of damage.