DeAU
DeAU VC One Serum, 30ml
DeAU VC One Serum, 30ml
@cosme rating: 5.0/7.0
An anti-aging beauty serum containing 100% pure, advanced vitamin C derivative
✓ 100% authentic
✓ Ships from Japan in 3-5 days
✓ Duties prepaid for US orders
✓ Tracked delivery via Japan Post
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What it is
Formulated with 100% pure, evolved vitamin C derivative (*1) solution (*2). Delivering fragile vitamin C stably and minimizing irritation as much as possible, it aims to make use of it continuously. Furthermore, its amphiphilic nature, which allows it to blend with both water and oil, allows for high penetration (*3). This evolved vitamin C derivative (*1) also has moisturizing properties. Addressing the increasing number of signs of aging, such as dark skin, lack of firmness, visible pores, and dryness, vitamin C (*2) addresses these issues all at once, leading to vibrant, moisturized skin with firmness, texture, and radiance. *Age-appropriate care (*1) 3-Laurylglyceryl ascorbic acid: A skin-conditioning ingredient (*2) Water, isopentyldiol, 3-Laurylglyceryl ascorbic acid, BG, phenoxyethanol (*3) Penetrates deep into the stratum corneum
Ingredients
Water, isopentyldiol, 3-laurylglyceryl ascorbate, BG, phenoxyethanol
How to use
After washing your face and toning your skin with lotion, take an appropriate amount of this product in the palm of your hand and apply it to your entire face or to areas of concern.
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.
DeAU VC One Serum is a serum formulated with 100% pure, advanced vitamin C derivative. Its stability and low irritation make it easy to continue using, while its amphiphilic nature means it blends with both water and oil for enhanced penetration! It's a vitamin C derivative that also has moisturizing properties. Vitamin C addresses all skin concerns, including signs of aging, leaving skin firm, radiant, and smooth, for vibrant, hydrated skin. It's non-sticky and easily absorbed into the skin, making it a great choice for morning skincare. This serum is recommended for those concerned with pores, dullness, and rough skin.
I was attracted to the fact that it was a "beauty serum containing 100% pure solution*2 of an advanced vitamin C derivative*1." I started using it because I wanted firmer, clearer skin. It has a light, watery texture. It blends well with the skin and is not sticky, so I found it easy to use in any season. It has a moisturizing feel, making it a great item to use when you're concerned about dryness. It seems to address multiple skin concerns, so I'm happy it will help me get closer to my ideal skin! *1 3-Laurylglyceryl Ascorbic Acid (skin conditioning ingredient) *2 Water, isopentyldiol, 3-Laurylglyceryl Ascorbic Acid, BG, phenoxyethanol
It has a refreshing texture that spreads easily and blends well with the skin, leaving it feeling non-sticky. *All comments on usage are personal opinions.
I tried it out. It's a concentrated beauty serum, but it has a smooth texture and isn't sticky. Because it's a concentrated beauty serum, I was worried about it stinging my skin, but I didn't notice any tingling and it was very comfortable to use.