Oat milk bath: what it does for your skin and how to run one
An oat milk bath softens the water and leaves skin feeling smooth and comfortable, especially when it feels dry. The trick is finely ground oat, warm (not hot) water, and a soak of 15 minutes or so.
Quick answer
- An oat milk bath is a warm bath with finely ground oat, or oat milk powder, dispersed in the water.
- The oat turns the water soft and milky, and skin tends to feel smoother and less tight afterwards.
- Run the bath warm, not hot, soak for 15 to 20 minutes and moisturise while skin is still slightly damp.
- It's about how skin feels: an oat bath is a cosmetic, not a medicine.
What is an oat milk bath?
An oat milk bath is a bath with finely ground oat stirred into the water. Ground fine enough, oat doesn't sink. It hangs in the water and turns it soft and milky.
You'll see two names for the oat that goes in:
- Colloidal oatmeal is oat ground into a powder so fine it stays suspended in water. It's been used in skincare for a long time and you'll find it in many bath and body products.
- Oat milk powder is a dried oat drink, ground to a powder. It disperses into the water the same way, and gives the bath its creamy look.
What does an oat milk bath do for your skin?
Oat contains starches and fats. In the bath they coat the skin lightly, which is why skin tends to feel softer and less tight afterwards rather than squeaky-clean.
People reach for an oat bath when skin:
- feels dry or rough, especially in winter or after a lot of hot showers
- feels tight after washing
- needs something gentle. Oat is one of the mildest things you can add to a bath.
Oat in a bath is about how skin feels: it is a cosmetic, not a medicine. If you have a skin condition, speak to your GP or pharmacist about what's right for you.
How long should you soak in an oat bath?
15 to 20 minutes is plenty. Longer soaks, especially in hot water, can leave skin feeling drier, which is the opposite of what you want. Our guide to how long to soak in the bath covers timing and temperature in more detail.
How to run an oat milk bath
- Run the bath warm, not hot. Comfortable on your wrist is about right.
- Add the oat as the bath fills, under the running tap, so it spreads evenly and the water turns milky.
- Soak for 15 to 20 minutes.
- Pat dry, don't rub. Then follow with your usual moisturiser while skin is still slightly damp.
Making your own? Grind plain oats in a blender until they're as fine as flour. Test a spoonful in a glass of warm water: if it settles at the bottom, grind it more. Or skip the mess and use a ready-made oat bath product. For a clay soak instead, see what kaolin clay does for your skin.
How often can you have an oat bath?
Two or three times a week suits most people. Once a day is the upper limit, and only if your skin is happy with it.
Oat in SLATE
SLATE has an oat block and a milk block, and you can use as many of each as you like in your Grid™. The System explains how texture blocks like these combine with scent blocks.
- OAT: colloidal oat. Calm and soften. The fine-ground oat this guide is about.
- MILK: goat's milk powder. Turns the water milky. Turns the water soft and creamy. It contains dairy, so it isn't oat milk; see our guide to the goat milk bath.
A Grid™ for a soft-skin soak
9 MILK · Goat's milk powder · Turns the water milky
12 OAT · Colloidal oat · Calm and soften
6 SOFT · Peach and magnolia · Be gentle
Build this Grid™ →
Common questions
What's the difference between an oat bath and a milk bath?
A milk bath uses dairy or plant milk powder; an oat bath uses finely ground oat. An oat milk bath is both: oat-based milk powder, so the water turns creamy with no dairy.
Is colloidal oatmeal the same as porridge oats?
It starts as the same grain, but colloidal oatmeal is ground much finer so it stays suspended in water instead of sinking.
Should I rinse off after an oat bath?
A quick rinse with clean water is fine if you like. Many people skip it and simply pat dry.
Can I use an oat bath if I'm allergic to oats?
No. If you have an oat or gluten sensitivity, check with your doctor first, and stop if your skin reacts.
Sources
- Safety Assessment of Avena sativa (Oat)-Derived Ingredients As Used in Cosmetics, Cosmetic Ingredient Review Expert Panel, International Journal of Toxicology, 2019
- Dermatologists' top tips for dry skin, American Academy of Dermatology
SLATE products are cosmetics for external use only. If you have a skin condition, are pregnant, or have any concerns, check with your doctor before use. Patch-test any new product. Keep out of reach of children. Contains essential oils; see each block's ingredient list for allergens. Every block contains sweet almond oil (tree nut).
SLATE is a soak for the body and mind: small-batch bath blocks of cosmetic-grade ingredients, made in the UK. Build your Grid™
