Dr. Nail
Dr. Nail Deep Serum, 3.3ml (Unscented)
Dr. Nail Deep Serum, 3.3ml (Unscented)
Rated 4.8 out of 7.0 by Japan’s largest beauty community
A nail treatment serum that penetrates to repair thin, weak, brittle nails.
✓ 100% authentic, ships from Japan
✓ Duties & taxes included for US orders
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What it is
Deep Serum is a 3.3ml nail treatment that soaks into damaged nails to repair them from within, unlike a surface hardener. Ingredients that strengthen the keratin bonds, plus penetration helpers, work inside the nail to build stronger, healthier nails. Horsetail extract, dimethyl sulfone, and hydroxypropyl chitosan help make thin, brittle nails supple and less prone to splitting. Fragrance-free.
Why it's different
Penetrates the nail to repair from within, not just coat the surface.
Strengthens keratin bonds to build stronger, healthier nails.
Horsetail, dimethyl sulfone, and chitosan make brittle nails supple and less prone to splitting.
How to use
1. Apply to clean, dry bare nails.
2. Brush it on before bed and let it absorb overnight.
3. Use daily for ongoing repair; it can be worn under polish.
Dr. Nail Deep Serum, 3.3ml (Unscented)
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.
How is it different from a hardener?
Unlike a surface hardener, it penetrates into the nail and repairs from within, strengthening the keratin bonds for healthier nails.
What nail concerns does it help?
It helps thin, weak, and brittle nails become stronger and more supple, so they are less prone to splitting.
How do I use it?
Apply it to clean, dry bare nails, ideally before bed so it absorbs overnight, and use it daily.
Is it fragrance-free?
Yes. This is the fragrance-free version, made for hand nails.
We ship internationally from Japan!
International Delivery Rates
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 international shipping take?
These estimates are for International Airmail and include 3 to 5 business days of processing in Japan.
- United States: 12 to 15 days
- Canada, United Kingdom, France, Germany: 9 to 12 days
- Australia, New Zealand, Denmark, Finland, India, Indonesia, Italy, Netherlands, Spain, Sweden, Switzerland: 10 to 13 days
- China, Hong Kong, Malaysia, Singapore, South Korea, Taiwan, Thailand, Vietnam: 8 to 10 days
- Rest of the world: 11 to 18 days
Please note that these are estimates only. Actual delivery can be affected by customs clearance, seasonal congestion, or carrier delays in the destination country, all of which are outside our control.
Will I have to pay customs or import fees?
For US customers: All US orders ship DDP (duties delivered prepaid), meaning we prepay all import duties on our end. Nothing is due at your door.
For customers outside of the US:
Unfortunately, we are unable to process prepaid custom taxes for any other countries other than the US. 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.