This two-layer serum contains zero water*3. This highly concentrated serum is formulated with a zero water formula*3, incorporating ENGY Stem S*1 and Vitamin Boost*5 containing niacinamide*4. It penetrates deep into mature skin*6, leading to smooth, beautiful skin. The highest concentration*2 serum delivers double the benefits of two layers. This serum combines two layers of oil-soluble and water-soluble ingredients. The oil softens and firms skin, while the moisture penetrates*6 and radiates translucency*7, even in mature skin. This two-layer serum contains no emulsifiers. Highly concentrated beauty ingredients are delivered deep into the skin*6 with penetration technology. Contains liposomal ENGY Stem S*1 at 7%, the highest concentration*2 in the Rainca series. This zero water formula*3 serum also contains 65% Vitamin Boost*5 containing niacinamide 3%. It penetrates deep into the stratum corneum of mature skin, which is difficult to penetrate, to charge and maintain the beauty ingredients. It leads to skin with a vibrant, clear appearance*7. Provides all-round anti-aging care*8. It also treats fine lines caused by dryness*9. It provides comprehensive care for the worrisome signs of aging skin*10. It has been evaluated for its efficacy in reducing the appearance of fine lines caused by dryness*9. *1 Human dental pulp cell conditioned culture medium (skin conditioning ingredient) *2 In the Rainca series *3 Fermented liquid is used as the base, not purified water *4 Skin conditioning ingredients *5 Niacinamide, biotin, ascorbyl tetrahexyldecanoate, retinol palmitate, folic acid (skin conditioning ingredient), Saccharomyces/rice fermented liquid, apple fruit water (moisturizing ingredient) *6 Up to the stratum corneum *7 By moisturizing *8 Age-appropriate care *9 Reduces the appearance of fine lines caused by dryness (efficacy evaluation test completed) *10 Lack of firmness and luster caused by dryness