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The Ancient Secret of Fermented Rice Water for Gorgeous Hair: Science Meets Tradition

Viori Team · ·
Updated · 4 min read
Viori Longsheng Rice Water Treatment canister with rice and pink flowers Save

The quick answer

Fermented rice water is rice soaking water left at room temperature for one to two days until it smells slightly sour. Fermentation makes it more acidic and is thought to change its levels of inositol and amino acids. Many people use it as a rinse after shampoo to add shine, diluting it and applying it every one to two weeks.

  • Ferment 24 to 48 hours, then refrigerate and use within a few days
  • Dilute for fine or low-porosity hair; stiff, brittle hair is a sign to cut back
  • Leave on 20 to 30 minutes, then rinse well with cool water

Do you ever wonder how some traditional beauty remedies stand the test of time while modern products come and go? Few trends have the staying power of fermented rice water.

Why Rice Water Is Having a Moment (Again)

Rice water isn't new-it's actually ancient. The women of the Yao ethnic group in Longsheng, China have used this technique for centuries, famously growing their hair to extraordinary lengths well into their later years.

But here's what most tutorials won't tell you: there's a significant difference between simply soaking rice in water and properly fermenting it. Here's a deeper look.

Basic Rice Water vs. Fermented Rice Water: What's the Difference?

Basic rice water is made by simply soaking rice in water for 30 minutes to an hour, straining it, and using the resulting liquid. While this provides some benefits, it's like choosing a bicycle when you could be driving a Ferrari.

Fermented rice water undergoes a biological transformation where natural yeasts and beneficial bacteria convert starches into compounds that your hair absolutely loves. The fermentation process is thought to change levels of compounds such as:

  • Inositol (vitamin B8)
  • Amino acids : The building blocks of keratin, your hair's primary protein
  • Antioxidants : Protect hair from environmental damage

How to Make Professional-Grade Fermented Rice Water

Here's a technique that balances traditional methods with careful preparation:

What You'll Need:

  • ½ cup uncooked organic rice (white, brown, or jasmine all work)
  • 2-3 cups purified water
  • A clean glass jar with lid
  • A fine mesh strainer or cheesecloth
  • Optional: 1 orange peel (adds natural antioxidants and a pleasant scent)

Step 1: The Cleansing Rinse

Rinse your rice thoroughly until the water runs clear. This removes surface impurities and excess starch that could lead to unwanted bacterial growth.

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Step 2: The First Soak

Place your rinsed rice in the glass jar and add 2-3 cups of water. Stir gently, then cover the jar with a breathable cloth (not the airtight lid yet). Let it sit at room temperature for 24 hours.

Step 3: The Fermentation Sweet Spot

After 24 hours, strain out the rice, preserving the liquid. Return this liquid to the clean jar, add the orange peel if using, and loosely cover. Allow it to ferment for another 24-48 hours at room temperature.

Pro tip: Don't let it ferment too long; it becomes more acidic and can irritate your scalp.

Step 4: The Stabilization Phase

Once you notice a slightly sour smell (similar to sourdough), it's perfectly fermented. At this point, move it to the refrigerator to halt fermentation. Use refrigerated rice water within a few days.

The Science of Proper Dilution: A Game-Changer

Here's something most tutorials miss entirely: different hair types need different concentrations of rice water. Using the wrong dilution can leave your hair feeling brittle or weighed down.

Match your hair type to these starting dilution ratios:

  • Low porosity hair (water beads on your hair, slow to get wet/dry): Dilute 1 part rice water with 4 parts purified water
  • Medium porosity (absorbs water at a moderate rate): Mix 1 part rice water with 2 parts purified water
  • High porosity (absorbs water quickly, dries rapidly): Use a 1:1 ratio or even undiluted for severely damaged hair

Application: Turning Technique into Results

The way you apply your rice water is just as important as how you make it:

  1. Wash your hair first with a gentle cleanser
  2. Slightly warm your rice water to a comfortable temperature
  3. Pour or spray the solution throughout your hair, paying special attention to the scalp
  4. Massage gently for 3-5 minutes to ensure even distribution
  5. Cover with a shower cap and leave on for 20-30 minutes (10-15 minutes for fine hair)
  6. Rinse thoroughly with cool water to close the cuticle

Balancing pH for Optimal Results

For those of you who want to take this to the next level, consider monitoring the pH of your rice water. The ideal range is 4.5-5.5, which aligns perfectly with your hair's natural pH.

How Often Should You Use Rice Water?

Even the best things can be overdone. A general guide:

  • For normal to dry hair: Once every 1-2 weeks
  • For oily hair: Once every 2-3 weeks
  • For damaged hair: Once weekly for the first month, then reduce to biweekly

Listen to your hair-if it starts feeling stiff or brittle, you may be experiencing protein overload. In that case, scale back and focus on moisturizing treatments.

Beyond the Basics: Customizing Your Rice Water

Once you've mastered the basic technique, try these professional variations:

  • Herbal infusions : Add rosemary, lavender (for calming), or green tea (for antioxidants) to your rice water during the second fermentation stage
  • Essential oil enhancement : Add 2-3 drops of rosemary, peppermint, or cedarwood essential oil (diluted in a carrier oil) just before application
  • Aloe boost : Mix 1 tablespoon of fresh aloe vera gel into your rice water before application for extra hydration

The Bottom Line

Rice water isn't just another passing trend-it's a time-tested tradition. When prepared properly, many people find it adds shine.

What makes this treatment special is that it connects us to ancient wisdom while allowing us to apply modern understanding of hair biochemistry. In our world of complex, expensive hair products, there's something beautiful about returning to such a simple yet effective solution.

Remember: Beautiful hair is healthy hair, and healthy hair comes from treating it with both knowledge and respect.

Common questions

How do you make fermented rice water for hair?

Rinse half a cup of uncooked rice, soak it in two to three cups of water for 24 hours, then strain. Let the liquid sit loosely covered at room temperature for another 24 to 48 hours. When it smells slightly sour, move it to the fridge to slow fermentation and use it within a few days.

What is fermented rice water?

Fermented rice water is the starchy water left after soaking rice, allowed to sit until natural yeasts and bacteria start to break it down. It turns slightly sour and more acidic than plain rice water. It has a long history of use among the Red Yao women of Longsheng, China, who are known for very long hair.

Is fermented rice water better than plain rice water?

Many people prefer it, but evidence for a big difference is limited. Fermentation lowers the pH, bringing it closer to hair, which is mildly acidic, about 4.5 to 5.5. That may help hair feel smoother. Over-fermented water gets too sour and can irritate the scalp.

How often should you use fermented rice water on hair?

Once every one to two weeks suits most hair, and every two to three weeks for oily hair. Using it too often can cause protein overload, which makes hair feel stiff or brittle. If that happens, take a break and focus on moisturizing conditioner.

Should you dilute fermented rice water?

Yes, for most hair. A common starting point is one part rice water to four parts water for low-porosity hair and one to two for medium porosity. High-porosity hair often tolerates a one-to-one mix. Dilution lowers the risk of stiffness and scalp irritation.

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