Discussion on the Compatibility of Azelaic Acid and Vitamin C
The way of skin care, the compatibility of ingredients, is related to efficacy and skin suitability. Azelaic acid and vitamin C are both commonly used ingredients in skin care, but whether they can be used together needs to be explored in detail.

Azelaic acid has antibacterial and anti-inflammatory properties, and can regulate the keratinization of hair follicles, which is effective on skin diseases such as acne. Its mild nature is suitable for a variety of skin types. Vitamin C, with strong antioxidant properties, can help the skin resist the damage of free radicals, brighten the skin tone, promote the synthesis of collagen, and make the skin firm and shiny.

On the chemistry of the two, vitamin C is acidic and has strong reducing properties. Although azelaic acid is also acidic, the chemical structure of the two is different. Generally speaking, in an acidic environment, the stability of vitamin C may be affected. If azelaic acid is used in combination with vitamin C, or due to changes in the environment, the oxidation of vitamin C is accelerated and its original effect is lost.

Looking at practical applications, some users taste the same use of the two, and feel no discomfort to the skin, and it seems that the skin care effect is superimposed. However, there are also users who feel red and itchy skin. This may be tolerated differently due to individual skin differences. Those with sensitive skin should be especially careful.

If you want to use azelaic acid and vitamin C, you should try it on a small scale first. If you take a small amount behind the ear or inside the arm, observe the skin reaction. If there is no discomfort, then gradually apply it to the face. And use it in time, or use one in the morning and one in the evening to reduce the possibility of mutual influence.

In short, the compatibility of azelaic acid and vitamin C varies from individual to individual and environment. Users should carefully observe the skin condition and act prudently to achieve the best condition of skin care and keep the skin healthy.