BARTH
BARTH Medicated Neutral Bicarbonate Bath, 3 Tablets
BARTH Medicated Neutral Bicarbonate Bath, 3 Tablets
@cosme rating: 5.1/7.0
Warm your body from the inside out with a neutral bicarbonate bath at home
✓ 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
BARTH is a neutral bicarbonate bath additive created using unique manufacturing techniques. The active ingredient, sodium bicarbonate, contains a high concentration of bicarbonate ions, which neutralize the water's pH and allow it to dissolve in the water for a long time. Water rich in bicarbonate ions enhances the benefits of a hot bath. The active ingredients also address chapped, cracked, and rough skin, supporting beautiful skin after a warm bath. [Key Points] . Rejuvenates the body. Relax and soothe your tired body with a relaxing soak in water rich in bicarbonate ions*. *The benefits of the active ingredient, sodium bicarbonate. . Long-lasting effects. BARTH's pH-neutral bicarbonate ions dissolve fully in the water, maintaining their concentration for a long time. . Made with gentle ingredients, no fragrances or colorants, and neutralized chlorine, it is gentle on the skin and suitable for sensitive skin and children.
Ingredients
Sodium bicarbonate, sodium carbonate. Other Anhydrous citric acid, PEG6000, vitamin C and sodium, and 1 other ingredient.
How to use
Dissolve 3 tablets in 160 liters of warm water (37-40°C) and soak in the bath for at least 15 minutes. While bathing, gently massage your body and scalp.
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.
Just having this in the bath makes all the difference in how tired I feel and how warm I am, so I find it incredibly useful. I used to add bath salts and magnesium to my bath, but with this, it feels like I have everything I need! It also helps relieve coldness.
I bought this after reading reviews. It warmed my body and made me feel warm after using it. I also gave it as a gift to a friend.
It's truly amazing, but when I add these, I stay nice and warm for a long time after bathing, regardless of the water temperature. My bathtub is small, but when I add three pills as instructed, I feel like my blood is fizzing and improving from my extremities while I'm soaking. There's no scent, no color, and the texture of the water barely changes. Sometimes I want to be energized by the smell of white water, but because this is colorless and odorless, it's great for use by everyone from babies to adults.
A friend recommended it to me, so I started using it as a treat. I wouldn't say it dramatically eases my body, but even after using it just once, I felt a little refreshed the next day.
It warmed me to the core. It's a little pricey, so I only use it on special occasions!