On the feasibility of glycolic acid as a toner
Now I want to explore whether glycolic acid can be used as a toner. Glycolic acid belongs to the class of fruit acids and has unique chemical properties and skin care effects.

Looking at its chemical structure, glycolic acid contains carboxyl groups. This structure gives it a certain acidity, which can moderately reduce pH value on the surface of the skin. Moderately acidified environment is beneficial to the skin, can regulate the acid-base balance of the skin, inhibit the growth of harmful microorganisms, and builds a layer of natural protection for the skin.

In terms of skin care effect, glycolic acid can accelerate the metabolism of the stratum corneum. The stratum corneum is the outermost layer of the skin. If the metabolism is sluggish, the old keratin accumulates, and the skin is prone to Glycolic acid can loosen the connections between keratinocytes, promote the shedding of old keratin, and make the surface of the skin smoother and more delicate, radiant and radiant. This effect is in line with the characteristics of toner to cleanse and condition the keratin.

However, using glycolic acid as a toner also poses challenges. If its acidity is not properly controlled, it may cause skin irritation. For sensitive skin, the skin barrier is relatively weak, and the use of high-concentration glycolic acid toner may cause tingling, redness, and even allergic reactions. Therefore, when formulating glycolic acid toner, it is essential to control the concentration.

In summary, glycolic acid can be used as a toner in theory, but its practical application needs to be carefully considered. For different skin types, the appropriate concentration should be accurately adjusted, and in the early stage of use, it is necessary to test the local skin before observing whether there is any discomfort. In this way, glycolic acid can be used in the toner to maximize the skin care effect and avoid damage to the skin.