AS1 function: clean exfoliants,mild and non-irritating,soft exfoliation,no added,include shedding of keratinocytes,lasting moisture retention,promote collagen regeneration. Water,urea,carboxamides,hyaluronic acid,lactic acid,diphenoxyethanol,perfume,ethylenediaminetetraacetiacid SA2 functions:exfoliating acne,gentle and non-irritating,strong cleansing power,mild horniness,relieves acne,rashes and other problems.effectively moisturizes and calms skin water,urea,adventure diamine tannic acid,salicylic acid,phenoxyethanol,spices,ethylenediaminetetraacetic acidc AO3 fuctions:Moisturizes and nourishes the skin,improves skin immunity,inhibits melamin,vitamin C nutrients supply to the skin,restores damaged cells,helps regeneration water ,purslane,carbamide,hyaluronic acid,aloe vera leaves.Phenoxyethanol,urea,spices Please contact us if you have any questions about this product.South Korea's small bubbles, big bubbles are common, this water cost-effective, 1 bottle can do an average of 10 guests. can be used in combination,So no matter what skin it belongs to, it can be used. AO3for skin that needs nutrition or hydration. SA2 is for sensitive skin. AS1nutrient solution can be used on all skin types.