BARTH
BARTH Medicated Neutral Bicarbonate Bath RELAX, 3 Tablets (1 Use) (LavenderFog)
BARTH Medicated Neutral Bicarbonate Bath RELAX, 3 Tablets (1 Use) (LavenderFog)
@cosme rating: 5.2/7.0
A gentle lavender scent perfect for getting ready for bed
✓ 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 FOR RELAX is a neutral bicarbonate bath additive created by BARTH, a company focused on sleep, with an original formula that combines the warming effects of bicarbonate ions with a relaxing fragrance.When added to hot water, it generates fine bubbles, allowing bicarbonate ions to dissolve thoroughly in the water and maintain their concentration for a long time.The active ingredients enhance the warming effects of the bath and promote fatigue recovery.BARTH's original fragrance is a balanced blend of 10 natural essential oils, including lavender.Key Features
Ingredients
Sodium bicarbonate, sodium carbonate. Other Fumaric acid, succinic acid, vitamin C and sodium, monosodium L-glutamate, PEG6000, fragrance, and 5 other ingredients.
How to use
Add approximately 3 tablets to 160 liters of lukewarm water (37-40°C) and wait until they have dissolved before bathing. Soak in the water for at least 15 minutes. The warm bath effect promotes blood circulation and relieves fatigue. While bathing, gently massage your body in the water.
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 was hesitant to buy it because it was quite expensive for a single dose, but I bought it because I wanted to relieve fatigue. The lovely lavender scent is soothing. I would like to buy it again and use it when I need it most.
A reward!!!
I've been searching for a colorless and odorless bath additive that has a rich fragrance, a nice consistency, and isn't cheap-looking in color, and I was finally convinced of the quality of BARTH! I wrote a review saying this, but before I knew it, the lavender scent was coming out!? I immediately jumped on it, and it dissolved in the bathtub, which was exactly what I was looking for. Thank you so much. Not only is it effective, but the scent is also elegant and doesn't linger after you get out of the bath, so it's great. I hope it never goes away!!
It took longer to dissolve than I expected.
I only bought one serving to try it out, but I want to buy it again!!! It's also one of my options when I want to give a gift to a friend. At first, the lavender scent is strong, but it changes to a citrus and woody scent that's soothing. It's the scent I like. It makes me feel warm after getting out of the bath, and I feel like I smell good even while I'm sleeping (lol). Even people who don't like lavender can give it a try!