Muji, a Japanese lifestyle brand, has refined an ancient beauty ritual into two streamlined products that target dehydrated and dull skin. The Muji BOOSTER fermented rice water skincare range features a serum and lotion that harness rice bran extract through a proprietary fermentation process developed over two years.
Rice farmers in Japan have long maintained supple, clear skin thanks to their regular contact with rice bran and rice rinsing water during cultivation and daily rituals. The grain contains natural anti-aging and antioxidant properties that have been recognized for centuries. However, traditional fermentation methods produced alcohol that could damage sensitive skin. Muji researchers spent two years developing a new extraction technique that eliminates this problematic byproduct while preserving beneficial nutrients.
The result is a product that delivers seven types of vitamins and eight minerals, improving firmness, smoothness, and hydration levels. Fermentation enhances the bioavailability of these nutrients, making them more effective when absorbed by the skin. This process breaks down compounds and amplifies the benefits to the skin compared to plain rice water. Ferulic acid levels increase during fermentation, providing stronger antioxidant protection against environmental stressors, such as pollution and UV exposure.
The serum contains over 65 percent rice ferment extract and has a thick texture that is ideal for those who prefer richer formulations. Its concentrated formula is particularly effective during dry winter months when the skin needs extra moisture. The lotion has a lighter consistency that absorbs quickly and feels refreshing in the warmer months. Both products target rough, dehydrated skin with a dull tone and texture.
Muji’s minimalist philosophy means you can choose one product instead of layering multiple steps. This approach simplifies your skincare routine while delivering the full benefits of concentrated formulations. The serum is ideal for those seeking intensive hydration, while the lotion is perfect for those who prefer faster absorption. Neither product requires pairing with the other, so you can choose based on personal preference and seasonal needs.
Miji sources its rice bran from Tendo City in southeastern Yamagata Prefecture. This practice supports local agriculture and reduces the environmental impact of transporting ingredients over long distances. This sustainable sourcing practice aligns with Muji’s broader commitment to responsible production. The fermentation process avoids organic solvents, resulting in an extract pure enough for consumption as a food ingredient. This gentle quality makes both products suitable for those with sensitive skin.
Fermented rice water contains postbiotics, which are metabolic compounds produced by probiotic bacteria during fermentation. One such compound is lactic acid, which provides gentle exfoliation without disrupting the skin barrier. This mild acid helps to smooth the skin’s texture and address clogged pores while maintaining appropriate pH levels. The formula’s antimicrobial peptides help balance skin flora and reduce problem areas prone to breakouts.
The products contain 100 percent natural ingredients, including Japanese camellia seed oil, apricot juice, and other botanical extracts. The formulation excludes mineral oil, alcohol, phenoxyethanol, and parabens. This clean ingredient profile addresses concerns about synthetic additives while maintaining product stability. Lactic acid gently exfoliates to treat clogged pores, dullness, and rough texture without the need for harsh scrubbing.
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Inositol, a form of vitamin B8 found in fermented rice, helps the skin lock in moisture and repair its protective barrier. This benefit extends to both dry and oily skin types, making the products versatile for different needs. Amino acids that are broken down during fermentation are more easily absorbed, which helps rebuild and smooth skin texture. These bioavailable proteins support cellular repair and renewal processes.
The range addresses pigmentation concerns by slowing melanin production at its source. Ferulic acid and rice peptides inhibit tyrosinase, an enzyme involved in dark spot formation. Regular application can gradually reveal a more even skin tone rather than simply masking discoloration temporarily. This approach targets the underlying cause of uneven pigmentation for lasting improvement.
The formula’s antioxidants, including ferulic acid and gamma-oryzanol, protect against oxidative stress, which accelerates visible aging. These compounds neutralize free radicals generated by environmental exposure and daily stressors. This protective action supports skin resilience and helps maintain a youthful appearance over time. Polyphenols in rice water provide additional photoprotective benefits that complement sunscreen use.
Fermented rice water stimulates collagen synthesis to maintain skin elasticity and firmness. Increased collagen production helps reduce the appearance of fine lines and creates a smoother overall texture. Its hydrating properties leave skin feeling plumper and more supple with consistent use. Deep moisture retention prevents the tight, uncomfortable sensation associated with dehydration.
The anti-inflammatory properties calm redness and irritation, making these products suitable for those with sensitive skin. Whether you are dealing with sunburn, sensitivity, or general inflammation, the soothing compounds provide relief. This calming effect makes the products appropriate for daily use without risking further irritation. Their gentle nature makes them suitable for compromised skin barriers that react negatively to harsher treatments.
The serum retails for $24.95 for 50 milliliters, and the lotion is available in two sizes: $5.95 for 50 milliliters and $18.95 for 300 milliliters. Both products will be available in stores and online starting September 26. The affordable price points make Japanese skincare technology accessible without a luxury markup.
Muji products are known for their clear, minimal packaging, which fits seamlessly into any bathroom aesthetic while keeping the focus on the contents rather than an elaborate design. This understated approach extends the brand’s philosophy of simplicity and functionality throughout the customer experience. The larger lotion size offers better value for those who prefer its light texture or use product generously.
