On the method of combining glycolic acid and retinoic acid
The method of combining glycolic acid and retinoic acid should be carefully examined and appropriate. Glycolic acid has the power of rejuvenating the skin, which can make the skin smooth and uniform in color. Retinoic acid is also an extraordinary substance, which can promote cell renewal and treat various skin diseases. However, it is strong in nature, and can be used alone or cause skin discomfort.

The two are used in combination, and if properly treated, they complement each other. Glycolic acid can start the process of micro-peeling the skin, making it easier for retinoic acid to penetrate the deep layers of the skin and exert its effect. However, at the beginning of the combination, it is advisable to start with small doses and low frequencies. If you use low-concentration glycolic acid products first, use them every two or three days, and wait for the skin to feel better, and then gradually increase the frequency. Retinoic acid should also be applied thinly every three to five days at the beginning of the low concentration. If the redness, swelling and desquamation are too great, you need to pause or extend the interval.

When used together, it is especially important to protect the skin. Sunscreen products must be used during the day, because the combination of the two may increase the skin's sensitivity to light. And moisturizing, you can prepare a mild moisturizing cream, and use it when you feel dry skin.

As for the effect of the combination, your mileage may vary. There may be immediate improvement in the skin, reduced fine lines, and good color; it may also take several months to show good results. However, it always depends on the state of the skin and is carefully conditioned to obtain the benefits of the combination of glycolic acid and retinoic acid and avoid its harm.