COMOACE PS Liquid

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COMOACE PS Liquid (Pure Sericin Serum)-20ml

COMOACE PS Liquid delivers the extraordinary benefits of 100% pure silk sericin directly to your skin. Sericin, derived from natural silkworm cocoons, contains 18 amino acids that resemble the structure of human skin, allowing it to deeply penetrate and effectively hydrate. The silk proteins help create a protective barrier to lock in moisture, smooth the skin’s texture, and shield it from environmental stressors like UV rays and pollution.

・Dermatologist-tested for sensitive skin compatibility.

Key Benefits:

• Deeply hydrates and locks in moisture for lasting smoothness.

• Promotes cell regeneration to repair skin.

• Forms a protective layer to defend against UV rays and pollution.

• Free from parabens, alcohol, mineral oils, and synthetic additives.

Key Ingredients:

• 100% Pure Sericin Extract: Deeply hydrates, enhances skin texture, and supports cell regeneration.

• Silk Proteins: Form a protective layer to lock in moisture and defend against environmental damage.

• Amino Acids: Promote elasticity and help repair skin tissues for a smoother, healthier appearance.

Usage Instructions: After cleansing and applying lotion, apply a few drops of the serum to your face. Gently spread it evenly over your skin, then finish with a cream. Suitable for daily use.

• Sustainability/Ethical Commitments: Free from parabens, alcohol, mineral oil, and synthetic dyes and fragrances, making it gentle and safe for all skin types, including sensitive skin.

 

FAQ:

• Can I use this serum in my morning and evening routines?

Yes, the serum is designed for both morning and evening use to provide continuous hydration and protection.

• Does the serum’s scent indicate a quality issue?

No, the natural scent comes from the high concentration of pure sericin extract and does not affect product quality.

• Is this product suitable for sensitive skin?

Yes, the serum is free from common irritants and is formulated to be gentle on all skin types, including sensitive skin.

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.

Water, Butylene Glycol, Sericin, Citric Acid, Xanthan Gum, Carbomer, Sodium Hydroxide, Sodium Sulfite, Phenoxyethanol

What our customers are saying about this product

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Selected Brands

All our brands are carefully picked and come from the most reputable clinics and manufacturers.

Best Quality

All our products come straight from the manufacturer to make sure you're getting the freshest stuff.

Fast Shipping

We only use express delivery to make sure you get your skincare goodies in the shortest time possible.


Unlike generic beauty retailers, Beauty Ninja carefully curates only the most advanced and luxurious Japanese skincare. Every product is tested and approved for its effectiveness.

Have a question?

See some of our common FAQS below

Yes! We source all products directly from Japanese brands, ensuring 100% authenticity.

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.

Visa, MasterCard, Amex, JCB, PayPal, Apple Pay, and Google Pay.

Orders ship within 1–5 business days (we often order directly from manufacturers to ensure freshness). Once shipped, delivery takes 5–10 days, but times may vary due to customs or other delays.

  • Free for orders over $250 USD
  • Flat rate $15 USD for all other orders.

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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Customer Reviews

Overall rating: 5.0 / 5 from 26 reviews.

I don't know how this serum works but I'm very pleased with the result! I use it in the morning as a lotion and my skin looks dewy and moisturized. There's no oily sheen and it absorbs quickly! A little goes a long way so it ends up being quite cost effective and the smell isn't overpowering. I highly recommend!!

COMOACE Pure Sericin Silk Extract Serum

The serum turned out to be colorless and odorless, which is very pleasant. The skin on my face is radiant. I highly recommend this serum!

COMOACE Pure Sericin Silk Extract Serum

Very satisfied with this product! The serum moisturizes my skin very well. It is lightweight, non-sticky and easily absorbed. I use it 1-2 times a week. I will order more

COMOACE Pure Sericin Silk Extract Serum

A wonderful serum. My skin feels more even and smooth. Used it with the Matcha lotion. I feel like my skin hasn't been like this in a long time. I always want to try new products but I will definitely get this one again!

COMOACE Pure Sericin Silk Extract Serum

Probably the best skincare product I've ever bought. I used this serum with the matcha beauty moisture lotion during the winter (-40 degrees) and my skin never once felt or looked dry. It absorbs very quickly into my skin and a little bit goes a long way so you don't run out of product too soon. After six months of using every morning and evening, there's still 2/3 of the bottle left. This serum is definitely staying in my top beauty finds!

COMOACE Pure Sericin Silk Extract Serum

I love, love, love this serum. It's the first thing I use in the morning. The formula is light and moisturizing, which makes my skin look and feel amazing after use.

COMOACE Pure Sericin Silk Extract Serum

The serum blends beautifully with the lotion. No stickiness. Excellent care. Small size, easy for when you're on the move

COMOACE Pure Sericin Silk Extract Serum

Good tool! I expected a "WOW" effect, but didn't get it. Perhaps this is due to my sensitive skin. This serum is still very decent!

COMOACE Pure Sericin Silk Extract Serum

I use this serum several times a week at night after lotion (without cream). In the morning, my face always looks rejuvenated! My skin seems to smoother, refreshed, with skin tone more evened out. I use the serum sparingly, it's very potent. Very happy with this purchase.

COMOACE Pure Sericin Silk Extract Serum

Good product that moisturizes and nourishes my skin. It applies smoothly and doesn't make my skin sticky and oily. But I didn't notice any super effect.

COMOACE Pure Sericin Silk Extract Serum

Good serum! I apply it several times because my skin absorbs it instantly. Skin is soft and hydrated after use. No sticky effect. I will definitely order again :)

COMOACE Pure Sericin Silk Extract Serum

The weightless serum leaves my skin incredibly silky. I use it with the Spa treatment lotion because it is also light and silky. It makes you want to touch your skin after using it!

COMOACE Pure Sericin Silk Extract Serum

Cool serum, that I have ordered previously. After using it, my skin feels smooth, clean and moisturized. I really like it 👍

COMOACE Pure Sericin Silk Extract Serum

Great serum! I apply it before bed and in the morning my skin is hydrated and radiant. Well absorbed, light texture and no sticky feeling after use. I use it all the time.

COMOACE Pure Sericin Silk Extract Serum

I am a fan of silk cosmetics. I buy this serum not for the first time. I am very satisfied. Light texture, moisturizes and nourishes my skin. Gentle care.

COMOACE Pure Sericin Silk Extract Serum

Gorgeous serum. Im using it for the second time with my skin becoming moisturized and radiant after using this product. It does not leave a greasy feeling and is suitable for my sensitive skin.

COMOACE Pure Sericin Silk Extract Serum

When I use the serum for the second time, it will definitely be on my list of favorites!! My skin is silky and hydrated and it does not cause allergies and rashes ....although this often happens to me when using other cosmetics.

COMOACE Pure Sericin Silk Extract Serum