Transderma
Transderma C, 10ml
Transderma C, 10ml
@cosme rating: 5.8/7.0
Renewed in February 2016! Experience translucency! Pure Vitamin C serum
✓ 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
Renewed in February 2016! The bottle and packaging have been redesigned, and the price has been revised. In addition, by improving the manufacturing process, the time it takes to blend into the skin has been reduced from 10 minutes to 5 minutes. This beauty serum contains vitamin C. ascorbic acid. *, a skin-conditioning ingredient that leads to beautiful bare skin, and leads to clear, firm, lustrous, and tight pores, resulting in firm, smooth skin. Transderma C does not contain water or oil, and contains only ingredients to penetrate pure vitamin C. It does not irritate the skin, and allows vitamin C* to be absorbed into the stratum corneum, restoring clarity and firmness to the skin. *Skin-conditioning ingredients. in an air-tight bottle to prevent oxidation. fragrance-free, color-free, alcohol-free, no animal-derived ingredients, no preservatives.
Ingredients
How to use
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.
I used it first after washing my face, as if it were an introductory serum. It gradually warmed up and I could feel it soaking into my skin. It comes in an airtight bottle that prevents oxidation, so I feel safe. Other than the price and the fact that I leave it out for a while after use, I'm happy with it.
It's been a while since I last used Transderma C. It's the best! It instantly brightens my skin, makes it shiny and radiant, refines my skin texture, and thanks to the tidying up, my face looks a size smaller! I bought the smaller version this time, but I didn't want to run out, so I ended up buying two more full-size bottles. It also provides extra moisture. It instantly brightens my skin, so I highly recommend it!
I used to use this product after learning that Risa Hirako was a fan. I wanted to try it again after a long time, so I bought the Moisture C Mini Set on Beauty Day. I think it really does have a pore-tightening effect. It's one of those serums that I can trust and feel is working.
I started with a trial. C → A → same series lotion → emulsion → cream. I started with a small amount, and immediately felt like porcelain skin! The next morning, I looked in the mirror excitedly and saw that my skin was smoother than usual. I was so impressed. On the second day, I used the regular amount. My skin felt a little smoother. I was surprised to see that my nasolabial folds were somehow less noticeable. I've had such severe dryness that I've tried so many department store samples. This one product is all I need, and the rest is just affordable cosmetics! I thought I was finally over my cosmetic obsession. But then, around the third day, I woke up and noticed noticeable fine lines. My skin was moisturized because I'd applied a moisturizing cream before going to bed! Why? As others have commented, some people experience skin irritation on the third or fourth day. That's why I'm giving it four stars. If you use it daily, it might be better to use less than the regular amount. I'm still considering buying the full product.
I use it as an introductory serum. It's easy to use and I can really feel it absorb into my skin, which is great. However, I found it difficult to leave it on for five minutes after use while raising a child.