Vitamin C stock solution - high penetration and anti-oxidation, brightens skin tone, promotes skin collagen synthesis, dilutes melanin precipitation, and effectively improves skin problems such as pallor, fine lines and pores. Hyaluronic Acid Stock Solution - instant hydration, long-term hydration, whitening, anti-aging, anti-wrinkle, solving dry peeling, large pores, dull lines and other problems.< /p> Vitamin A Retinol Stock - Hydrates Skin & Pores, Whitens Skin & Evens Skin Tone Vitamin B Stock Solution - Promotes Collagen Production, Improves Skin Health the skin, restores moisture to the skin and effectively reduces spots. How to use: After cleaning the face, apply an appropriate amount of essence on the face with a dropper and pat gently until absorbed.