Rice bran (nuka) is generated as a by-product during the milling of white rice. In Japan, where rice has long been a dietary staple, large quantities of rice bran are produced every year. While some of this material is utilized for rice oil extraction or agricultural applications, a considerable portion remains underused. At the same time, rice bran has played an important role in Japanese food culture for centuries through nukazuke—vegetables fermented in a bed of rice bran known as nukadoko.
The fermentation of rice bran in nukazuke is driven by lactic acid bacteria and is valued not only for preserving food and enhancing flavor, but also for its perceived health and beauty benefits. In Japan, it has even been said that the hands of those who regularly prepare nukazuke remain smooth and beautiful. Rice bran itself contains a variety of beneficial components, including γ-oryzanol, vitamins, and ceramides, making it an attractive material for cosmetic applications.
Building on this traditional knowledge, Rice Bran Ferment was developed by applying modern cosmetic science to fermented rice bran. The ingredient is produced using a proprietary micronization process that gives rice bran a smooth, skin-friendly texture, followed by controlled fermentation with Lactobacillus plantarum for 18 to 24 hours. This process enhances beauty-related components while preserving the natural characteristics of rice bran, resulting in an ingredient suitable for gentle cleansing formulations.
In recent years, increased attention has been paid to the impact of cleansing on skin comfort and barrier function. Scrubs are commonly used to remove dead skin cells and unclog pores, leaving the skin feeling smooth and refreshed. However, physical exfoliating particles may also cause irritation, micro-tears, or over-exfoliation, particularly for sensitive skin types. In addition, excessive cleansing or the use of harsh surfactant systems can strip away natural oils, weakening the skin’s protective barrier and leading to dryness and discomfort.
Against this background, formulators are seeking cleansing solutions that balance effectiveness with skin comfort. When incorporated into cleansing products, Rice Bran Ferment helps improve skin moisture, reduce skin roughness, and enhance cleansing performance while providing a gentle, comfortable skin feel. Rather than relying on aggressive physical exfoliation, it supports effective cleansing in a way that respects the skin’s natural barrier.
By combining Japanese fermentation tradition with advanced processing technology, Rice Bran Ferment offers a unique approach to modern cleansing. It reflects a growing shift toward gentle, barrier-conscious skincare while contributing to sustainable ingredient development through the upcycling of rice bran. This fusion of tradition, science, and sustainability makes Rice Bran Ferment a compelling choice for next-generation cleansing formulations.
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About ICHIMARU PHARCOS
We, ICHIMARU PHARCOS, a company in Japan, have more than 60 years of history in the field of research and development of cosmetic active ingredients obtained from natural resources. Our products are highly evaluated by both world-class cosmetic companies and local cosmetic manufacturers around the world. Not only do we distribute our natural ingredients, but we also supply the latest cosmetic trends, intellectual properties, and cosmetic laws in the world.
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