MUJI Fermented Booster — 65%+ Rice-Bran Ferment Concentration

Specifications

Brand

MUJI

Type

First-Step Booster Serum

Volume

50 mL or 100 mL

Key Ingredients

Rice Bran Ferment Filtrate, Ceramide NP, Amino Acids, Hydrolyzed Hyaluronic Acid

Made In

Japan

Fragrance

Fragrance-Free

Texture

Rich, Viscous Serum

Packaging

PET Bottle with PP Pump and Cap

Features

More Than 65% Rice Bran Ferment Liquid: Our primary formula component gives skin moisture and a feeling of firmness while supporting the serum's first-step conditioning role.

100% Naturally Derived Ingredients: The complete formula is made with naturally derived ingredients, including ingredients created through chemical reactions from natural sources.

5 Clearly Stated Formula Exclusions: The formula is fragrance-free, colorant-free, mineral-oil-free, paraben-free and alcohol-free.

2 Sizes: 50 mL And 100 mL: Choose a compact pump bottle or a larger format while keeping the same formula and place in your routine.

1 To 2 Pumps Per Use: The pump format gives a clear daily amount for spreading the serum over the face after cleansing.

26 Declared Cosmetic Ingredients: The complete official formula includes rice bran ferment filtrate, humectants, Ceramide NP, amino acids, hydrolyzed hyaluronic acid, yeast extract and rice bran oil.

Benefits

Moisture And Firmness From A Fermented First Step: More than 65% of the formula is rice bran ferment liquid, our moisture-focused base for helping skin feel hydrated and firm. The concentrated first step gives freshly cleansed skin a calm, cared-for feeling before the rest of your routine begins.

Prepare Skin For The Moisture That Follows: Applied before lotion, the serum smooths the skin so moisturizing ingredients can reach the stratum corneum more easily. You move into the next step with skin that feels prepared, comfortable and ready for the moisture you already use.

A Clear Formula For Everyday Comfort: The formula uses 100% naturally derived ingredients and leaves out fragrance, colorants, mineral oil, parabens and alcohol. You can build a straightforward routine around a clearly defined formula that keeps attention on moisture and daily comfort.

Rich Texture Makes The First Step Feel Complete: A rich, viscous texture spreads across freshly cleansed skin before lotion. The substantial serum feel turns a simple pump application into a quiet conditioning step, leaving your routine feeling deliberate without adding complicated tools or preparation.

Two Sizes Fit The Way You Use It: Choose the compact 50 mL pump or the larger 100 mL pump, each with the same formula and use order. You can begin with less space or keep more on hand while maintaining one familiar daily step.

How to Use

Cleanse your face.

Dispense 1 to 2 pumps into your hand.

Smooth the serum over your entire face.

Who Is This For

The Thoughtful Routine Builder: You care about what goes on your skin and want every step to have a clear purpose. When skincare routines become crowded with vague promises, choosing what belongs after cleansing can feel harder than it should. Our rich booster serum gives you a simple first step before lotion, built around more than 65% rice bran ferment liquid with ceramide, amino acids and hydrolyzed hyaluronic acid. Choose the 50 mL size to begin or the 100 mL size for continued use. If you value moisture, clear ingredients and an orderly routine, this was made for the way you care for your skin.

Product Story

In 1980, we began with 40 everyday products shaped by three lasting principles: select materials carefully, streamline the process and simplify the packaging. That practical approach later reached skincare, where each step needed a clear reason to exist. We developed this booster around a formula containing more than 65% rice bran ferment liquid, then placed it in a simple pump bottle for use immediately after cleansing. The rich serum was made to add moisture, smooth the skin and prepare the stratum corneum before lotion. Today, the same disciplined approach gives a modern routine one calm, purposeful first step.

What's Inside

• MUJI Fermented Booster Serum 50 mL Pump Bottle
• MUJI Fermented Booster Serum 100 mL Pump Bottle

Care Guide

Ingredients and Materials

Rice Bran Ferment Filtrate: Product ingredient

Glycerin: Product ingredient

Butylene Glycol: Product ingredient

Propanediol: Product ingredient

Pentylene Glycol: Product ingredient

PEG/PPG/Polybutylene Glycol-8/5/3 Glycerin: Product ingredient

Ceramide NP: Product ingredient

Alanine: Product ingredient

Arginine: Product ingredient

Sodium Glutamate: Product ingredient

Serine: Product ingredient

Proline: Product ingredient

Hydrolyzed Hyaluronic Acid: Product ingredient

Yeast Extract: Product ingredient

Dipotassium Glycyrrhizate: Product ingredient

Diglycerin: Product ingredient

Ethylhexylglycerin: Product ingredient

Rice Bran Oil: Product ingredient

Oleyl Alcohol: Product ingredient

PPG-7-Buteth-10: Product ingredient

PPG-20 Methyl Glucose Ether: Product ingredient

Polysorbate 80: Product ingredient

PEG-60 Hydrogenated Castor Oil: Product ingredient

Xanthan Gum: Product ingredient

Citric Acid: Product ingredient

Sodium Citrate: Product ingredient

Comparison

Quick Answer

Fermented booster serum is a first-step facial serum made in Japan with more than 65% rice bran ferment liquid. Used after cleansing and before lotion, it adds moisture, helps skin feel firm and smooths the skin so later moisturizing ingredients can reach the stratum corneum more easily.