Rice Water for Skin: The Folklore, the Evidence, and the DIY Risks

Rice water for skin is the cloudy water left after rinsing or soaking rice. It carries starch, some protein and sugar, minerals and a few vitamins, and it has a long history as a face and hair wash in Asia. We found no controlled trial of plain rice water on facial skin, and homemade fermented batches grow a mixed crowd of bacteria. Below: where the tradition comes from, what is in the water, what studies of rice ingredients show, and how to keep a DIY batch from becoming a culture.

Where does the rice water tradition come from?

A 2024 systematic review of rice-washed water describes its use in China since ancient times to clean the face and hair. It also records that female rice farmers in China, Japan and other Southeast Asian countries used it to bathe and wash.

The best-known story is about hair, not skin. According to the same review, the Yao women of Huangluo, China, believe the fermented rice water they use on their hair keeps it long, black and smooth. Today the idea circulates on social media, and a 2025 letter in a dermatology journal analyzed rice water content for hair and skin on TikTok.

The review is frank about the gap. It notes that beauty blogs promote direct use of rice-washed water despite the lack of proper scientific validation, and it calls research on it scarce. Keep that in mind for the rest of this piece.

What is actually in rice water?

Rinse water picks up whatever washes off the grain. The 2024 review lists protein, ash, sugar, starch, fat, minerals such as iron, zinc, magnesium, potassium, calcium and selenium, and vitamins B2 and E. Rinsing also strips vitamins from the rice. One study it cites found thiamin losses of 42 percent when polished rice was washed in tap water.

The mix is not fixed. The review notes that brown rice carries more protein, lipids, minerals and vitamins than refined white rice, and that researchers have compared wash water from different rice types. Two bowls of rice water can differ a lot.

Starch has one clear physical property. The review notes that native starch granules can act as a Pickering emulsifier, one that removes grease. That fits the old habit of washing both oily pots and faces with it. It describes cleansing, not treatment.

Component	What is known on skin
Starch	Used in cosmetics as an absorbent; studied in bath water for barrier recovery
Minerals, vitamins B2 and E	Present; we found no skin data at rice-water levels
Bran compounds such as ferulic acid and gamma-oryzanol	Studied in formulated creams, not in rice water

The starch point comes from a safety review that lists rice starch as an absorbent and bulking agent in 51 cosmetic formulations. Rice bran, the outer layer that polishing removes, is a rich source of plant compounds. Its oil contains ferulic acid, gamma-oryzanol and phytic acid, antioxidants studied as cosmetic raw materials. We found no measurement of how much of these ends up in a bowl of rinse water.

Does rice water for skin work? What the evidence shows

Start with the direct evidence. We searched PubMed for controlled trials of plain rice water on facial skin and found none. Everything below concerns rice ingredients, not the rinse water itself.

• Rice starch baths. Healthy volunteers had forearm skin irritated with a detergent, sodium lauryl sulfate. The skin was then exposed to rice starch bath water twice daily for 15 minutes. That gave a 20 percent improvement in the healing of the damaged barrier, measured as water loss. Barrier function in people with atopic dermatitis also improved. The abstract gives no sample size, and a bath is not a face splash.
• Rice bran baths. The Cosmetic Ingredient Review panel notes a report of fewer skin lesions in atopic dermatitis patients after bathing with a rice bran preparation.
• Rice bran creams. In a 28-day study, 30 volunteers used gels and creams with rice bran compounds packed into tiny carrier vesicles. The formulas improved hydration, elasticity and roughness readings. That is a formulated product, several steps removed from rice water.
• Pigment. Rice glucosylceramides and a ceramide called elasticamide reduced melanin production in melanoma cells and lab-grown melanocytes. The human result in that paper came from swallowing a rice ceramide extract for 8 weeks, not from applying anything.
• Hair. Even where the folklore is strongest, a 2022 systematic review found only 10 studies of rice bran for hair, six on efficacy and four on safety. The efficacy work centered on growth signals.

A 2022 dermatology review is more upbeat. It describes rice-derived ingredients as antiaging, anti-inflammatory, whitening, photoprotective and moisturizing. Look at what it covers, though: rice components such as phenolic compounds, squalene and rice bran, not plain rinse water.

Some of the smooth feel after a rice water rinse is simply water. Hydration flattens the valleys between skin ridges, and the effect usually fades within about 4 hours. How the barrier itself breaks and recovers is covered in skin barrier repair.

Rice water claims, checked against the evidence

• "Brightens and evens tone." Cell studies on rice ceramides, and one human result that came from swallowing an extract. We found no topical human trial.
• "Anti-aging." A 28-day study of rice bran compounds in carrier vesicles, not rice water. We found no trial of rice water on wrinkles.
• "Soothes eczema and dry skin." Rice starch and rice bran baths, in a few reports. Eczema belongs with a dermatologist.
• "Clears acne" or "tightens pores." We found no study of either.
• "Grows hair." Ten rice bran studies, mostly on growth signals and safety.

The strongest rice-and-skin trial we found is not about rice water at all. In a 12-week randomized trial in 111 people, an oral extract of fermented rice germ improved wrinkle, elasticity and hydration measures against placebo. A supplement trial says nothing about splashing rinse water on your face, and we are not suggesting you take one.

Why homemade fermented rice water is a gamble

Fermenting is the trend's favorite step, and it is where the risk comes in. Rice wash water is rich in nutrients, so microorganisms multiply in it readily. When researchers sequenced washing rice water at different fermentation times, the core microbes included Lactobacillus. They also included Pseudomonas, Serratia, Enterobacter, Clostridium and Acinetobacter, and which ones grew depended on the environment.

That is a mixed culture you did not choose. The study did not test harm to skin. For cosmetics, the FDA notes that injuries from contamination are not common but can be serious, and that contaminated eye-area products, and lotions used in hospitals, have caused serious infections. It adds that some microorganisms grow faster in warm or damp storage. It also calls microbial contamination a common reason for cosmetic recalls. A jar of rice water fermenting on a warm counter has water, nutrients, warmth and no preservative.

Commercial rice ingredients are a different object. The Cosmetic Ingredient Review panel assessed rice-derived ingredients, including rice starch and rice bran extract. It concluded they are safe as cosmetic ingredients in the practices of use it described. It also judged current heavy metal levels in them not a safety concern. A finished water-based product normally includes a preservative. A homemade batch has none, and our piece on whether skincare expires explains why that matters.

If you try rice water anyway

None of this is a reason to panic about a rinse. It is a reason to keep it simple.

• Skip the fermentation. It adds microbes and no proven benefit.
• Make it fresh and small. Keep it cold and throw it out rather than saving it for days. We found no tested shelf life for homemade rice water, so this is ordinary food-safety reasoning, not a tested rule.
• Keep it away from your eyes and off broken, irritated or freshly treated skin.
• Patch test first. The safety review calls rice generally non-allergenic but notes isolated cases of allergy to raw rice. Our patch test guide covers how.
• Stop if it stings, itches or smells sour.
• Prefer finished products if you want rice ingredients. On a label they appear under names such as Oryza sativa (rice) starch, bran extract or bran oil, and our ingredient list guide explains the order.

If the look you are after is the smooth, reflective finish sold as glass skin, our piece on the glass skin routine covers what actually produces it.

Frequently asked questions

Does rice water brighten skin?

We found no human trial showing that rice water fades dark spots or evens tone. Rice ceramides reduced melanin in cell studies, and the only human result in that paper came from swallowing an extract. Daily sunscreen and proven pigment ingredients have far more evidence.

Is fermented rice water better than fresh?

Not on current evidence, and it carries more risk. Sequencing of fermented rice wash water found a mix of bacteria that shifted with conditions, including Pseudomonas and Enterobacter. No study has shown a skin benefit from fermenting it at home.

Can rice water help eczema or very dry skin?

Rice starch added to bath water improved barrier recovery in one study, including in people with atopic dermatitis. That was a bath, not a leave-on face rinse. Eczema is a medical condition, so see a board-certified dermatologist, and avoid homemade fermented products on broken skin.

How long does homemade rice water last?

Nobody has tested it, so there is no safe number to give. General food-safety reasoning applies: rice water is rich in nutrients, and many microbes grow faster when it is warm. Make a small batch, keep it cold and discard it rather than storing it.

Does rice water help acne?

We found no study of rice water for acne. Adding an unpreserved, nutrient-rich liquid to breakout-prone skin is not an obvious help. For persistent acne, see a dermatologist, because prescription options exist.

Is rice water safe for everyone?

A cosmetic ingredient safety review calls rice generally non-allergenic, though it notes isolated cases of allergy to raw rice. The risks that matter more come from contamination, use near the eyes, and use on broken skin. Patch test first and skip the fermenting step.