KIEHL’S
Kiehl’s DS RTN Renewing Serum, 50ml
Kiehl’s DS RTN Renewing Serum, 50ml
Conquer visible pores*1 and awaken firmness and radiance!
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• Authenticity guaranteed.
• Ships direct from Japan in 3-5 days
• Custom duties & tariffs fully handled by us for US customers.
• Track your order via USPS, Royal Mail, Canada Post, Australia Post.
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What it is
An anti-aging serum containing micro-retinol, born from dermatology, is finally here! Retinol, a type of vitamin A known as a useful ingredient in anti-aging, reduces the appearance of dry fine lines and works on signs of aging. Kiehl's has developed a unique formula that allows you to enjoy aggressive care while reducing the burden on your skin! This Retinol Renewing Serum, which is focused on feeling good and comfort, addresses the loss of firmness and the appearance of dry fine lines. It should be useful for care when you start to notice changes in your skin problems. Pure retinol. skin conditioning ingredient. Care that gives a firmness that suits your age Reduces the appearance of fine lines caused by dryness. Firmness, luster, uneven texture, lack of transparency Notes in product images. * Skin conditioning ingredient
Ingredients
How to use
For daily skincare, after applying lotion, apply 2-3 pumps to the entire face, then follow with cream or lotion. We recommend using it at night. Avoid using on the upper eyelids and lips, where the skin is particularly thin. Be careful not to get it in your eyes. Use 1 pump on the neck and décolleté. When using in the morning, be sure to use sunscreen. *Do not use while pregnant or breastfeeding. *Do not use if your skin is particularly sensitive or immediately after laser or wax treatment. [For customers experiencing retinol*1 for the first time] - Start with a small amount every two days to allow your skin to comfortably become accustomed to retinol*1. After that, use once a day while monitoring the condition of your skin. If you are concerned about irritation, we recommend using it after cream.
We ship internationally from Japan!
Frequently Asked Questions
Are the products you sell authentic?
Authenticity is 100% guaranteed. We source directly from the brand, or from official stores within Japan.
All products are fresh off the shelves and never outdated.
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 was worried about the irritation of retinol serums, but I was surprised at how easy this was to use. Since I started using it, my skin texture has improved, and it feels so much smoother when I touch it after washing my face in the morning. My skin has also gradually become firmer, and it looks healthier. Rather than having an immediate effect, I feel like my skin's overall condition improves with continued use. I think this serum is recommended even for those new to retinol.
I usually use DHC retinol, but the sample of Kiehl's was good so I bought the full product for the first time. I have a problem with my pores so I use Kiehl's Vitamin C serum, but I would like to use this serum at night. My skin became smooth when I used the sample, so I'm looking forward to seeing how my skin will be when I finish using it.
Effective for firmness and radiance. I used up three bottles in search of firmness and radiance. I think it was effective because I was able to put it in my beautiful skin. The capacity is large, so I was able to use it for several months. However, since the bottle is glass, I wondered if I could use it until the very end. It's expensive, so I wanted to use it even if I had to dig it out. After that, I wanted an effect on my pores, so I tried another retinol, but it was more effective on my pores, so I switched to that one.
I love this product! My skin feels so smooth the next day, and I haven't had any reaction to it, so it's really easy to use. I've repurchased it several times.
I bought a trial size! I was a little hesitant to try it, but it works for my skin! I'm going to keep using it!