1.No tolerance established
Although both VC and VA are recognized as effective skin care products, their effects are obvious and also highly irritating. Compatibility must therefore be established regardless of the time of their application, otherwise the skin barrier can be destroyed.
2. Not everyone is suitable.
Skin care needs vary from person to person. The skin care concept of morning C and evening A is very good, but not suitable for everyone. It is best to avoid this skin care method for people with sensitive skin and serious skin problems. In addition, pregnant, pregnant and lactating girls are not allowed to try it, so as not to harm the baby.
3. There is no strict sun protection.
VA and VC react to light in some way (VA is photosensitive, VC oxidizes easily when exposed to light). Therefore, both must be stored protected from light and at the end of skin care, sunscreen must be added to increase protection.
4. Do not use with acidic products at the same time.
The combination of acidic substances and morning C and evening A products can cause excessive irritation, which not only reduces the skin’s protection, but can also damage the skin barrier.