Reinca
Reinca Stem Treatment Dual Repair Serum, 30ml
Reinca Stem Treatment Dual Repair Serum, 30ml
Rated 4.0 out of 7.0 by Japan’s largest beauty community
A two-layered serum containing the highest concentration*2 of stem cell culture extract*1
✓ 100% AUTHENTIC, SHIPS FROM JAPAN
✓ DUTIES & TAXES INCLUDED FOR US ORDERS
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What it is
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
Ingredients
How to use
After using the lotion, shake the container well and apply an appropriate amount (2 pumps) to your skin. Apply more to areas where you are concerned about dryness or skin problems.
We ship internationally from Japan!
Frequently Asked Questions
Is this authentic?
Yes. We only buy from official retailers and directly from the brands here in Japan. Never resellers, never grey market stock.
We are beauty lovers too, so we know the worry, especially with something you are putting on your face. Authenticity is 100% guaranteed by us.
What are your shipping rates?
On orders under US$75, shipping is a flat US$20 to the United States and US$10 to all other countries.
Orders of US$75 or more ship free, applied automatically at checkout. Your exact shipping cost is shown before you pay.
How long does delivery take?
These estimates are for International Airmail (Tracked) and include 3 to 5 business days of processing in Japan.
- United States: 12 to 15 business days
- Canada, United Kingdom, France, Germany: 9 to 12 business days
- Australia, New Zealand, Denmark, Finland, India, Indonesia, Italy, Netherlands, Spain, Sweden, Switzerland: 10 to 13 business days
- China, Hong Kong, Malaysia, Singapore, South Korea, Taiwan, Thailand, Vietnam: 8 to 10 business days
- Rest of the world: 11 to 18 business days
Actual delivery can be affected by customs clearance, seasonal congestion, or carrier delays in the destination country, all of which are outside our control.
Do you offer express shipping?
Yes. As of 22 July 2026, we offer International Express Mail through Japan Post. The cost is based on order weight and is calculated automatically at checkout.
Will I pay customs or import fees?
US orders: No. As of July 1, 2026, all US orders ship DDP (duties delivered prepaid), meaning we prepay all import duties on our end. Nothing is due at your door.
Orders outside the US: Possibly. Duties and import taxes are set by your local customs authority and are not collected at checkout, so any charges on delivery are your responsibility.
We're working on rolling out prepaid duties for more countries soon.