On the Differentiation of Toner and Essence of Glycolic Acid
There are many kinds of skin care products in the world, and glycolic acid is also often present in both toner and essence. To understand whether glycolic acid is a toner or an essence, it is necessary to analyze the characteristics of the two and the nature of glycolic acid.

Toner is mostly a water agent texture, light and easy to absorb. It is often used after cleansing to quickly replenish water, adjust the pH of the skin, and provide a base for subsequent skin care. If glycolic acid is stored in toner, its concentration is usually slightly lower, aiming to gently rejuvenate the skin, remove waste exfoliation from the surface of the skin, make the skin smoother, and open the way for subsequent nutrient absorption. And the toner contains many moisturizing and soothing ingredients to balance the possible stimulation of glycolic acid.

Serum is not the case, its texture is thick and the concentration of nutrients is high. The main purpose is to solve deep-seated skin problems, such as anti-aging, whitening, repair, etc. If glycolic acid is added to the serum, the concentration is often higher, which can penetrate deep into the bottom layer of the skin, promote keratinocyte renewal, stimulate collagen production, improve skin texture and elasticity, and has a more significant effect. However, due to its high concentration, it also requires high skin tolerance.

Glycolic acid can be a toner, with its gentle rejuvenating power, laying a good foundation for the skin; it can also be an essence, which can improve the deep condition of the skin with high concentration and strong effect. Choose glycolic acid as a toner or essence, depending on personal skin type and skin care requirements. For those with sensitive skin or new to glycolic acid, a toner containing glycolic acid should be selected to gradually build skin tolerance; for those with good tolerance and want to significantly improve the skin, a serum containing glycolic acid may be a good choice.