Dr. Nail
Dr. Nail Deep Serum, 6.6ml
Dr. Nail Deep Serum, 6.6ml
Rated 4.8 out of 7.0 by Japan’s largest beauty community
A new type of nail treatment created by a pharmaceutical company
✓ 100% AUTHENTIC, SHIPS FROM JAPAN
✓ DUTIES & TAXES INCLUDED FOR US ORDERS
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What it is
For all women with nail concerns. This innovative nail treatment, approved by nail experts, is a high-performance nail care serum that maintains healthy nails and promotes nail fashion. It penetrates and repairs thin, brittle nails. It contains ingredients that strengthen the bonds between the keratin that makes up the nail and promote penetration, leading to strong, healthy nails. Horsetail Extract: A herbal extract rich in organic silicon, essential for nail strength. Dimethyl Sulfone: Replenishes the organic sulfur necessary for keratin production, promoting healthy nails. Hydroxypropyl Chitosan: Allows organic silicon and organic sulfur, which normally do not penetrate the nail, to penetrate deep into the nail. It also remains on the nail surface as a veil, retaining moisture for supple, brittle-resistant nails. Unlike nail hardeners, which are applied to the surface to protect them, or cuticle oils, which moisturize the surrounding area, this product penetrates directly into the nail itself, repairing it from the inside out. With a proven track record in over 20 countries around the world, including Europe and the United States, we offer a completely new level of nail care for your nails.
Ingredients
Water, ethanol, dimethyl sulfone, PG, hydroxypropyl chitosan, horsetail extract, ethoxydiglycol
How to use
Apply to clean, dry natural nails. Just apply to your nails before bed and go to sleep! It's most effective if you don't wash your nails with water for a long time and apply before bed! If you stop using nail polish for a while and apply it directly to your natural nails, your nails will grow healthier. Once your nails are healthy, you can enjoy your nails to your heart's content again! We recommend applying it to the entire bare nail, but if you have nail art, you can also use it on the base of your nails as they grow out, or on the natural nails on the underside of your nails.
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.