{"product_id":"muji-fermented-booster-serum-50ml","title":"MUJI 発酵導入美容液 (Hakkō Dōnyū Biyōeki) — Fermented Booster Essence 50ml | Japan","description":"\u003c!-- MUJI Fermented Booster Serum 50ml — EN listing --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- Generated: 2026-05-08 | Agent: Product Onboarding v1.1 --\u003e\n\u003ch1\u003eMUJI Fermented Booster Serum — Japanese Fermented Skincare Serum 50ml\u003c\/h1\u003e\n\u003cdiv class=\"product-short-description\"\u003e\n\u003cp\u003eMUJI's minimalist answer to the fermented skincare trend. This fragrance-free, alcohol-free booster serum is built on a \u003cstrong\u003eSaccharomyces fermentation of rice bran\u003c\/strong\u003e — delivering amino acids, Ceramide NP, and Hydrolyzed Hyaluronic Acid in a featherlight pre-toner step. Viral on TikTok J-beauty communities for its \"glass skin\" priming effect. No parabens, no phenoxyethanol, mildly acidic, allergy tested. The definition of clean, effective minimalism — exactly what MUJI does best. Ships from Kobe, Japan.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003chr\u003e\n\u003ch2\u003eKey Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFermented rice bran activates skin's natural renewal\u003c\/strong\u003e — Saccharomyces Ferment Filtrate (rice bran) is rich in Beta-glucan, amino acids, and organic acids that stimulate cellular turnover and improve skin texture over time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5 skin-essential amino acids\u003c\/strong\u003e — Alanine, Arginine, Sodium Glutamate, Serine, and Proline directly replenish the skin's Natural Moisturizing Factor (NMF), restoring moisture retention from within.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCeramide NP barrier reinforcement\u003c\/strong\u003e — boosts the intercellular lipid matrix to reduce TEWL (transepidermal water loss) and protect against environmental irritants.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHydrolyzed Hyaluronic Acid for deep hydration\u003c\/strong\u003e — low-molecular HA penetrates below the surface layer, holding moisture where it's needed most rather than just sitting on top.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra-clean, allergy-tested formula\u003c\/strong\u003e — free from fragrance, alcohol, parabens, and phenoxyethanol. Mildly acidic (matches skin's natural pH). Perfect for reactive, sensitive skin types.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eMUJI (無印良品)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct Name (JP)\u003c\/th\u003e\n\u003ctd\u003e発酵ブースターセラム\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003ctd\u003e50ml pump bottle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStep\u003c\/th\u003e\n\u003ctd\u003ePre-toner booster (first step after cleansing)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFormula\u003c\/th\u003e\n\u003ctd\u003eFragrance-free \/ Alcohol-free \/ Paraben-free \/ Phenoxyethanol-free\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTested\u003c\/th\u003e\n\u003ctd\u003eAllergy tested, mildly acidic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBest For\u003c\/th\u003e\n\u003ctd\u003eAll skin types; ideal for sensitive, dry, and dull skin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCountry of Origin\u003c\/th\u003e\n\u003ctd\u003eJapan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr\u003e\n\u003ch2\u003eWho Is This For?\u003c\/h2\u003e\n\u003cp\u003eAnyone who wants to take their existing skincare routine to the next level without adding complex actives or fragrance. MUJI's booster serum is perfect as a first step after cleansing to \"prime\" the skin before toner and moisturizer — boosting absorption of everything that follows. It's particularly popular with those following a J-beauty minimalist routine, sensitive skin types who react to preservatives, and anyone chasing a hydrated, glass-skin glow without fuss or fragrance.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eHow To Use\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003eUse as the very first step after cleansing, on dry or slightly damp skin.\u003c\/li\u003e\n\u003cli\u003eDispense 1–2 pumps onto your palm.\u003c\/li\u003e\n\u003cli\u003ePress gently into skin across the entire face, focusing on dry areas.\u003c\/li\u003e\n\u003cli\u003eImmediately follow with your regular toner, essence, or moisturizer — the fermented complex primes skin for better absorption of subsequent steps.\u003c\/li\u003e\n\u003cli\u003eUse morning and evening as part of your daily routine.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003chr\u003e\n\u003ch2\u003eFull Ingredients\u003c\/h2\u003e\n\u003cp\u003eWater, Glycerin, Butylene Glycol, Saccharomyces Ferment Filtrate (Rice Bran Fermentation Liquid), Ceramide NP, Alanine, Arginine, Sodium Glutamate, Serine, Proline, Hydrolyzed Hyaluronic Acid, Yeast Extract, Sodium Acetylated Hyaluronate, Citric Acid, Xanthan Gum.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eNote: INCI verified from MUJI product page and retailer sources. Confirm full list with supplier documentation before publishing.\u003c\/em\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eCautions \u0026amp; Warnings\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eFor external use on face only. Avoid eye area.\u003c\/li\u003e\n\u003cli\u003eContains Yeast Extract — those with yeast sensitivities should patch test before full use.\u003c\/li\u003e\n\u003cli\u003eAlthough allergy tested, individual reactions are possible. Discontinue if irritation occurs.\u003c\/li\u003e\n\u003cli\u003eKeep out of reach of children. Store at room temperature away from sunlight.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1 × MUJI Fermented Booster Serum, 50ml pump bottle\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eShipping \u0026amp; Store Notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eShips directly from Japan.\u003c\/li\u003e\n\u003cli\u003eProcessing time: 2–6 business days.\u003c\/li\u003e\n\u003cli\u003eTracking number provided after dispatch.\u003c\/li\u003e\n\u003cli\u003eImport duties and taxes may apply depending on destination country.\u003c\/li\u003e\n\u003cli\u003eOpened cosmetics and supplements cannot be returned for hygiene and safety reasons.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2\u003eAuthenticity Guarantee\u003c\/h2\u003e\n\u003cp\u003e100% authentic MUJI product sourced from official Japanese retail channels. Shipped from Kobe, Japan.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2\u003eFAQ\u003c\/h2\u003e\n\u003ch3\u003eWhat does \"booster serum\" mean — how is this different from a regular serum?\u003c\/h3\u003e\n\u003cp\u003eA booster serum is applied before your toner (not after), on bare cleansed skin. Its job is to soften the skin barrier and prime it for better absorption of everything that follows. Think of it as unlocking your skin before applying actives.\u003c\/p\u003e\n\u003ch3\u003eIs fermented skincare better than non-fermented?\u003c\/h3\u003e\n\u003cp\u003eFermentation breaks down large molecules into smaller, more bioavailable components. The rice bran ferment in this serum provides amino acids and organic acids that are more readily absorbed by skin than unfermented equivalents. Japanese skincare has used fermentation for decades — this is a science-backed tradition, not a trend gimmick.\u003c\/p\u003e\n\u003ch3\u003eIt's fragrance-free — does it have no smell at all?\u003c\/h3\u003e\n\u003cp\u003eIt has a very subtle, neutral natural scent from the fermented rice bran base — no added fragrance. Most users describe it as nearly odorless.\u003c\/p\u003e\n\u003ch3\u003eCan I use this with retinol or acid exfoliants?\u003c\/h3\u003e\n\u003cp\u003eYes. The mildly acidic formula and clean ingredient list make it compatible with most actives. Apply the booster first, then wait 30–60 seconds before applying retinol or acids.\u003c\/p\u003e\n\u003ch3\u003e\u003cbr\u003e\u003c\/h3\u003e","brand":"MUJI","offers":[{"title":"Default Title","offer_id":46894884880559,"sku":"MUJI Fermented Booster","price":3600.0,"currency_code":"JPY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/7561\/5151\/files\/1_f9f43a4f-b554-4004-b2eb-78ef940ea1cc.png?v=1778649553","url":"https:\/\/tsujimotomarket.com\/products\/muji-fermented-booster-serum-50ml","provider":"Tsujimoto Market","version":"1.0","type":"link"}