Green Tea Bath: What It Does and How to Make One

A green tea bath is exactly what it sounds like: a warm bath with brewed tea in the water. It’s easy and cheap to try. The health claims around it are much stronger than the evidence, though, so it helps to know what has and hasn’t been tested.

What are the benefits of a green tea bath?

They’re mostly unproven. We found no controlled trial of a full-body bath in brewed green tea. The research we found used extracts or concentrated catechin products, which is a different thing.

Here’s what has been studied:

What was tested	Who	What it found	Why it doesn’t prove much
Green tea extract bath, 3 times a week for 4 weeks	4 children, ages 5 to 9, with eczema	Eczema and itch scores fell, but those changes weren’t statistically significant	Only 4 patients and no comparison group. The extract came from AmorePacific, and some authors worked at its R&D center
Bath with a green tea extract teabag for 4 weeks	20 people with eczema, in a pilot study of children’s bath products	No significant improvement. The authors called it not efficacious enough for further trials, though users rated it well	A small pilot with extract teabags, but it’s the closest match to a home soak that we found
Foot bath with green tea polyphenols for 12 weeks	94 older patients with athlete’s foot	Overall skin assessment was better, but affected area, recurrence and lab findings matched placebo	A foot bath with added polyphenols, not a tea bath
Green tea extract applied to skin	Acne trials, pooled	Fewer acne lesions	Tested formulations, not bath water. Authors call for better trials
Prescription ointment	Adults with external genital and perianal warts	FDA approved	A specific drug made with a green tea extract

Even the eczema pilot isn’t a home recipe. It used 700 mL of a 5% extract solution in 150 liters of water at 37°C (98.6°F) for 30 minutes. You can’t copy that with tea bags, and it wouldn’t tell you what happens in adults.

Why isn’t bath water the same as a skin product?

Skin studies use measured amounts of a prepared ingredient. A review of acne research found some evidence for tea polyphenols in topical formulations, but it also said better studies are needed.

The catechin EGCG is also fragile. A review of its use on skin says it’s unstable, and that it holds up better at higher concentrations, lower temperatures and lower pH. A warm, dilute bath isn’t close to those conditions. That comparison is our inference, not a tested finding. We also found no study measuring how much catechin reaches your skin from a home tea bath.

If you’re curious about catechins in general, NCCIH says definite conclusions can’t yet be reached on most uses of green tea, even as a drink or supplement. Our page on EGCG in green tea covers that side.

How do you make a green tea bath?

There’s no tested recipe, so this is a simple starting point, not a dose.

1. Steep 4 to 6 green tea bags in about 4 cups of just-boiled water for 5 minutes.
2. Take out the bags. They keep loose leaves out of your drain.
3. Fill the tub with warm water, not hot.
4. Pour in the tea and stir the water with your hand.
5. Soak for 5 to 10 minutes.
6. Get out carefully, pat your skin dry with a clean towel, and rinse the tub.

The soak time comes from the American Academy of Dermatology (AAD), which suggests limiting baths to 5 to 10 minutes in warm water if you have dry skin. It also says to pat your skin dry instead of rubbing.

Short on time? Drop the tea bags straight into the running water, and take them out before you get in.

Do a patch test first

Do this before your first soak, even if you drink green tea every day. AAD’s advice on testing skin care products is a useful model. We’ve adapted it for tea, so it isn’t an official tea protocol.

1. Brew a cup of tea and let it cool.
2. Dab it on a quarter-sized spot on the underside of your arm or the bend of your elbow.
3. Leave it for about 5 minutes, then rinse. AAD uses that time for products you’d wash off.
4. Repeat twice a day for 7 to 10 days.

If the spot turns red, itchy or swollen, wash it gently and don’t use the tea on your skin again.

When should you skip a green tea bath?

• Broken skin: skip it if you have cuts, open sores or raw patches. Even the prescription ointment’s label says to avoid use on open wounds, and we found no safety testing of brewed tea baths.
• Allergy: skip it if you’ve reacted to tea, green tea skin products or the patch test.
• Slippery tub: tubs get slick when wet. MedlinePlus, writing for older adults and people with medical problems, advises non-slip suction mats or rubber silicone decals in the tub, a non-skid mat outside it, and a dry floor. If you don’t have these, or getting in and out is hard, skip the soak.
• Eczema or another skin condition: ask your dermatologist first, and don’t swap a prescribed treatment for a tea bath.
• Children: the eczema pilot was too small to guide home use, so ask your pediatrician.

MedlinePlus also advises setting your water heater to no more than 120°F (49°C) to avoid burns.