KINS Serum
KINS SERUM - 30ml
KINS SERUM is a Japanese skincare serum designed to replenish moisture, strengthen the skin barrier, and support healthy skin through microbiome-focused care. Developed alongside KINS BOOSTER after nearly 10,000 tests, the formula combines fermented extracts, ceramides, and skin-conditioning ingredients to help maintain balanced, resilient, and radiant skin.
The mildly acidic formula works in harmony with the skin’s natural ecosystem while deeply hydrating and helping protect against dryness and irritation. Fermentation-derived ingredients help nourish the skin with amino acids, peptides, and vitamins, while vitamin C derivative supports brightness and collagen production for a smoother, more luminous complexion.
Lightweight yet nourishing, the serum absorbs comfortably into the skin without heaviness, making it ideal for daily use morning and night.
Key Benefits:
- Provides long-lasting hydration and moisture retention.
- Supports healthy skin barrier function with human ceramides.
- Helps improve skin brightness and radiance.
- Supports smoother, softer, and healthier-looking skin.
- Gentle daily formula suitable for sensitive skin.
Key Ingredients:
-
Lactobacillus Acidophilus / Soymilk Fermentation Liquid:
Fermentation-derived ingredient rich in amino acids and peptides that helps support hydration and healthy-looking skin. -
Saccharomyces Cerevisiae Extract:
Yeast-derived extract packed with amino acids, vitamins, and peptides that help nourish and condition the skin. -
Human Ceramides (Ceramide AP & Ceramide NP):
Help strengthen the skin barrier and prevent moisture loss for smoother and more resilient skin. -
3-O-Ethyl Ascorbic Acid:
Stable vitamin C derivative that helps improve radiance, support collagen production, and provide antioxidant protection. -
Fermented Aspergillus / Soybean Seed Extract:
Antioxidant-rich fermented ingredient that helps moisturize skin and improve uneven tone and dullness.
How to Use:
- Use morning and evening on cleansed skin.
- Apply immediately after KINS BOOSTER or BOOSTER MOIST.
- If not using a booster, apply before toner.
- Dispense one drop into the palm of your hand and gently smooth over the entire face.
Sustainability / Ethical Commitments:
- Free from parabens.
- Free from ethanol.
- Free from synthetic fragrance.
- Free from artificial colorants.
- Microbiome-conscious skincare formula.
Certifications / Clinical Studies:
- Developed through nearly 10,000 formulation tests.
- Mildly acidic formula designed to support healthy skin balance.
- Contains human ceramides closely resembling the skin’s natural structure.
FAQ:
・Is this suitable for sensitive skin?
Yes. The formula is designed to be gentle, mildly acidic, and suitable for sensitive skin types.
・What are the main benefits of this serum?
The serum helps deeply hydrate, strengthen the skin barrier, improve radiance, and support healthy skin balance.
・Can I use this every day?
Yes. It is designed for daily morning and evening use.
・Does this serum contain fragrance or alcohol?
No. The formula is free from synthetic fragrance, ethanol, parabens, and artificial colorants.
・Are there any allergens to be aware of?
Some ingredients are derived from soybeans. Those with soy allergies should consult a healthcare professional before use.
We ship internationally from our warehouse here in Tokyo. We use the services of third-party delivery service providers, namely, Japan Post (EMS) and Airmail, for shipping all the orders placed by our customers. View our entire policy here.
Every skin is different, therefore, no returns are accepted simply on the account that the product had an adverse reaction on your skin, or did not provide you any particular kind of results that you were expecting. However, you may initiate a return for the defective and damaged products purchased from the website within a period of7 (seven) days calculated from the order delivery date (“Return Period”). View our entire policy here.
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In Japan, expiration dates are usually not printed on cosmetics unless required (e.g., food or medicated products). However, we keep small stocks and order directly from manufacturers to ensure you get the freshest products. Most items have a shelf life of 2–3 years when stored properly in a cool, dry place away from direct sunlight.
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We ship to over 60 countries, including the USA, UK, Australia, Canada, and most of Europe and Asia. See our shipping page for the full list.
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