When using a highly concentrated Vitamin C ampoule

Due to the nature of the ingredients, you may feel a stinging sensation.

Rather than using the ampoule immediately after toner

Try applying the serum first, then the ampoule.

If you apply serum and then apply ampoule

It stung much less than when I only applied toner.

And if you also use eyelash serum

Please use it after a certain amount of time has passed!

If you use a nutritional supplement immediately after applying a vitamin product

The vitamin product got into my eyes and it really stung!!!