Usage Guidelines for Stabilized Vitamin C (Natural-c Glycol)

Here is the information regarding the use of Stabilized Vitamin C (Natural-c Glycol) based on the staff's reply:

• Can it be applied directly without mixing?
  Yes, it can be applied directly.

• Should it be applied before or after moisturizer? Are there any ingredients it should not be used with?
  It should be used at a different time than other products. It is best to avoid using it simultaneously with ingredients like Vitamin B3 (Niacinamide) as it can degrade Vitamin C. If using other products, it is recommended to apply them at least 30 minutes apart.

• Can it be used in the morning? Is it photosensitive? Can sunscreen be applied afterwards?
  Yes, it can be used in the morning. You can apply sunscreen afterwards as usual. However, when using other products like sunscreen or creams, please check their ingredients to ensure they do not contain substances that could degrade the Vitamin C (such as Vitamin B3).