COS DE BAHA Galactomyces Serum 30ml

Values: 100% Genuine (Adilsons policy) · FA-Conditional (see Sensory section) · Fragrance-Free (confirmed via INCI) · Vegan-Friendly* / Cruelty-Free* (brand-stated, see Section on Conscious Formulation).

Pros: lightweight daily hydration, gentle enough for AM and PM, pairs easily with actives, budget-accessible entry into ferment skincare. Caveats: the full ordered INCI beyond five confirmed ingredients could not be independently verified in this research pass; the fermented smell is normal but noticeable; no independent reviews for this exact SKU were found yet.

Classification: GREEN-to-YELLOW. Galactomyces ferment filtrate and 2% niacinamide are both mild, non-exfoliating ingredients used safely across most ages; this is closer to a hydrating essence than a clinical-strength active. Teens (14+) dealing with dullness or early pore concerns can use it under adult guidance; it is not necessary for pre-teen skin, which does not yet need brightening or barrier-support actives.

Bedside-compatible: yes, no sink needed. Requires rinsing: no. Requires precise dosage: no, a few drops. Wait time: minimal (10-20 seconds). This qualifies as a core piece of a bare-bones 2-3 product routine (cleanser optional, this serum, moisturizer/SPF) on days when a full 10-step routine is not realistic.

Step 1 (When): AM and PM, after cleansing/toning. Step 2 (How much): 3-5 drops or one pump. Step 3 (How): pat into slightly damp skin, do not rub.

Introduce this as the ONLY new product in your routine. Wait a full 14 days before adding anything else. This isolation window ensures you can identify whether any reaction is caused by this specific product.

1. Optional gentle cleanse or rinse. 2. Optional watery toner. 3. COS DE BAHA Galactomyces Serum — 3-5 drops, pat in. 4. Moisturizer. 5. Sunscreen SPF50+ PA++++ (non-negotiable). In humid Mauritius mornings, this serum's glycerin/HA content pulls water from the humid air itself, which is why it can feel effective with very little product.

1. Double cleanse if wearing SPF/makeup. 2. Optional toner. 3. COS DE BAHA Galactomyces Serum — 3-5 drops, pat in, wait 30-60 seconds. 4. Any targeted active (niacinamide/retinol/acid) on a non-conflicting night. 5. Moisturizer. This product is compatible in the Recovery nights of a 4-night skin-cycling protocol.

Technique: pat/press, do not rub — friction degrades the formula and increases irritation risk. Skin state: slightly damp is ideal, for better spread. Wait time: 10-20 seconds before the next watery layer, 30-60 seconds before a heavier product. Hands deliver 100% of product; cotton pads absorb approximately 30-40% — use hands unless applying as an exfoliant swipe (not applicable here).

This is an encyclopedia map of all product types. You do not use all of these daily. You select modules based on your skin state.

Global rules: viscosity ladder thinnest to thickest, water-phase before oil-phase, treatments before seals. Wait-time defaults: watery layers 10-20s, serum layers 30-60s, 10-15 minutes before sunscreen if going outdoors. Amount defaults: toner/essence 5-8 drops, serum 2-3 drops or 1 pump, eye product half a rice grain, gel moisturizer 1-1.5 peas, cream 1-2 peas, occlusive rice-grain to pea, sunscreen 2-finger rule for face. Hydrators sit best on slightly damp skin; retinoids on fully dry skin; exfoliating acids on dry or lightly damp, one lane only. If the routine pills, stings, or feels heavy, reduce layers, not increase.

AM Maximum Stack: 1. Rinse/gentle cleanse (optional). 2. pH-prep toner (optional). 3. Hydrating toner layers (optional, 1-3). 4. Essence (optional). 5. Mist (optional). 6. Booster/soothing serum (optional). 7. Antioxidant lane — choose one (LAA Vitamin C on dry skin, or a gentler antioxidant). 8. Pigment support lane — choose one (TXA/arbutin/azelaic if AM-tolerated). 9. Hydration serum lane (HA/polyglutamic/beta-glucan) — this product can serve this role. 10. Oil-control lane (niacinamide/zinc), choose one. 11. Peptide/repair lane (optional). 12. Eye product (optional). 13. Moisturizer. 14. Optional sealing layer if dry/AC. 15. Sunscreen SPF50+ PA++++ (non-negotiable). 16. Lip SPF (optional). In AM, prioritize comfort and SPF adherence over stacking; in high humidity, fewer layers often perform better.

PM Maximum Stack: 1. Micellar pre-cleanse (optional). 2. Oil cleanser/balm if wearing SPF/makeup. 3. Water cleanser. 4. pH-prep toner (optional). 5. Hydrating toner layers (optional). 6. Essence (optional). 7. Soothing/barrier serum (optional). 8. Anchor product — this serum, or your active of the night. 9. Targeted serum (optional, only if non-conflicting). 10. Moisturizer. 11. Sleeping mask (optional). 12. Occlusive seal (optional, avoid if clog-prone). 13. Spot treatment (as needed). 14. Lip sleeping mask (optional). Do not layer retinoids with AHA/BHA in the same night; keep one lane per night.

Lane strictness: Retinoid OR Exfoliation OR Strong Vitamin C (LAA) OR Acne-control active per routine; barrier/hydration can always accompany. If unsure, default to the safest lane — barrier/hydration — and reduce layers.

Tier: water-thin to light fluid — apply after cleansing/toning, before creams. Layering rule: thinnest to thickest, water-phase before oil-phase. Phase: water-phase; layers cleanly under both gel and cream moisturizers with no known pilling triggers among the confirmed ingredients.

Dullness/uneven tone: niacinamide inhibits melanosome transfer from melanocytes to keratinocytes. Dehydration: the ferment filtrate and its accompanying humectants draw and hold water in the upper skin layers. Secondary benefit: ferment filtrates are associated with a smoother-feeling surface texture with regular use. What it cannot do: it cannot physically shrink pore size (pores don't have muscles to contract) — it can only reduce the appearance of debris-stretched pores over time by supporting even oil regulation; it cannot resolve significant hyperpigmentation on its own at this niacinamide concentration.

Sunscreen (mandatory AM): primary — Beauty of Joseon Relief Sun: Rice + Probiotics SPF50+ (in stock); alternatives — SKIN1004 Centella Hyalu-Cica Water-Fit Sun Serum, Anua Heartleaf Silky Moisture SunCream, ROUND LAB Birch Juice Tone-Up Sunscreen.

Moisturizer to seal: primary — Beauty of Joseon Dynasty Cream (in stock); alternatives — Dr.Althea 147 Barrier Cream, Anua Birch Moisture Boosting Cream, SKIN1004 Centella Probio-Cica Enrich Cream.

Pigment-support pairing: this serum's niacinamide alone is mild; for stronger pigment targeting, primary — COS DE BAHA Vitamin C Serum (AM only, different lane); alternatives — Beauty of Joseon Glow Deep Serum, COS DE BAHA Tranexamic Serum, Beauty of Joseon Glow Serum: Propolis + Niacinamide.

Pilling risk with this product: none identified among confirmed ingredients; general pilling risk rises when stacked with 3+ other silicone- or film-forming products — reduce layers if that happens.

Water-Permeable (wudu-compatible). This is a watery, non-occlusive, non-film-forming essence-serum; water reaches the skin surface normally during ablution. Adilsons provides this assessment based on the product's physical properties. Rulings on wudu validity vary between scholars — consult your own trusted Islamic authority.

MYTH: "Galactomyces serums are basically fancy water." REALITY: ferment filtrates carry amino acids, organic acids, and trace minerals produced during fermentation that plain water does not, though the magnitude of benefit at any given concentration still depends on the whole formula.

MYTH: "The yeasty smell means it has gone bad." REALITY: a mild fermented/rice-water scent is characteristic of genuine galactomyces ferment filtrate and is not, by itself, a spoilage sign — see the Stability section below for actual spoilage indicators.

In air-conditioned environments for extended periods, this product's humectant content can pull moisture from deeper skin layers instead of the air — always seal with a moisturizer when in AC for hours at a time. Mauritius tap water hardness varies by region; if you notice tightness after cleansing, that is more likely a hard-water residue issue than this serum, and a pH-balancing toner beforehand helps.

*Clinical evidence for galactomyces ferment filtrate specifically is largely in-vitro and brand/community-reported rather than large-scale human trials; treat as an Emerging evidence tier.

Full INCI list: Galactomyces Ferment Filtrate, Glycerin, Niacinamide, 1,2-Hexanediol, Sodium Hyaluronate. [--- Estimated 1% Line ---] Not determinable — only five ingredient names could be independently corroborated via search-result summaries in this research pass (direct page access to INCIDecoder/WhatsInMyJar was blocked in this environment); the brand's complete ordered ingredient list beyond these five is not publicly disclosed in a source we could verify. Treat the above as a partial, medium-confidence list rather than the full official INCI.

Preservative system: 1,2-Hexanediol (a multifunctional preservative-booster/solvent commonly used in place of traditional parabens in Korean formulas).

Fragrance status: Fragrance-Free (no Parfum/Fragrance listed in the confirmed ingredients). Scent: a faint yeasty/rice-water note from the ferment filtrate itself — this is normal, not spoilage. Intensity: 1-2 out of 5, dissipates within 1-5 minutes. EU 26 allergen screen: none detected in the confirmed ingredient list. Alcohol disclosure: Alcohol-Free based on the ingredients confirmed.

Halal: *Self-assessed by Adilsons based on available INCI data. No ethanol from fermentation, no porcine-derived ingredients, and no haram animal-derived ingredients detected in the declared ingredient list. This is NOT a formal Halal certification. Muslims with stricter requirements should consult their own scholars.

Vegan: *Self-assessed by Adilsons based on available INCI data. No animal-derived ingredients detected. This is NOT a formal vegan certification by The Vegan Society or equivalent body.

Cruelty-Free: *Brand-stated policy. Not independently certified by Leaping Bunny, PETA, or equivalent third-party audit. Mainland China retail presence for this brand was not confirmed either way in our research.

Microplastic-Free: Yes, based on the ingredients confirmed.

MFDS Classification: not publicly confirmed as Functional Cosmetic; treat as General Cosmetic pending evidence. Clinical evidence: no brand-run clinical study for this exact SKU was found; ingredient-level evidence for niacinamide is Strong, for galactomyces ferment filtrate is Emerging*. Evidence confidence: Medium overall.

Fungal Acne Safety: FA-Conditional. Galactomyces Ferment Filtrate itself is not a documented Malassezia-feeding fatty-acid ester, and community consensus generally treats it as low-risk, but yeast-ferment ingredients as a category occasionally trigger reactions in some fungal-acne-prone users — patch test if you know you are reactive to ferment products.

Assessment: Low. No known pilling triggers among the confirmed ingredients. If pilling occurs, it is more likely caused by a heavy silicone-based product layered on top — wait longer between layers or reduce the number of products.

Fresh color: clear to pale straw. Storage: keep out of direct bathroom-window sun and away from prolonged heat above roughly 30°C; Mauritius bathroom humidity is otherwise not a major concern for this sealed-bottle format. Spoilage signs: a strong sour/off smell beyond the normal mild ferment scent, visible cloudiness or separation, or a color shift to noticeably darker yellow-brown. When in doubt, discard.

Patch test: inner forearm for 24 hours, then behind the ear for 24 hours, then begin facial use. If adverse reaction: STOP ALL ACTIVES. For 72 hours, use ONLY gentle cleanser plus plain moisturizer plus mineral SPF — no acids, retinoids, Vitamin C, exfoliants, or essential oils. After 72 hours, reintroduce ONE product per 14 days. Emergency stop signals: hives, swelling, blistering, persistent burning, or breathing difficulty — seek emergency care.

1. Skipping sunscreen and expecting brightening results. 2. Rubbing instead of patting, which increases friction irritation. 3. Expecting galactomyces alone to fade established dark spots without a dedicated pigment active. 4. Applying to bone-dry skin instead of slightly damp for better spread. 5. Storing the bottle on a sunny bathroom windowsill. Overuse threshold: this is a low-risk daily product; there is no established overuse ceiling at 2x/day.

Volume: 30ml. Amount per use: 3-5 drops (~0.5-0.7ml). Approximate uses per container: roughly 45-60 applications at recommended dosage. Lifespan: at twice-daily use, approximately 3-4 weeks; overdosing at 2-3x the recommended amount shortens this without improving results. Reorder roughly 2 weeks before you expect to run out to allow for delivery time.

This serum's job is hydration plus mild tone-evening in a lightweight, ferment-based format — it sits in the hydration serum lane of the AM/PM stack. AM: cleanse (optional) → toner (optional) → Galactomyces Serum → moisturizer → sunscreen. PM: cleanse → toner (optional) → Galactomyces Serum → any active you're running that night → moisturizer.

If your skin is barrier-compromised right now: use this serum alone with a plain moisturizer for a few days before adding any acid or retinoid back in. If you are in AC all day: seal this serum with a moisturizer, don't leave it to evaporate. If you want stronger pigment correction: add a dedicated Vitamin C or arbutin serum in a separate lane rather than expecting this one to do both jobs.

Bundle idea: this serum + Beauty of Joseon Dynasty Cream + Beauty of Joseon Relief Sun forms a complete, gentle daily hydration-and-protection routine.

After purchasing, you will receive our skincare education email series covering this product in depth. The recommendations above are based on formulation synergy with COS DE BAHA Galactomyces Serum, not on margin or stock levels. If a pairing does not exist in our catalog, we say so. If you already own a product that fills the same role, use what you have first.

We do not currently carry another dedicated galactomyces-led serum to compare this against directly — this category is under sourcing review beyond this one SKU. If your primary goal is stronger tone-brightening rather than general hydration, see the pigment-support pairings above instead of treating this as an alternative.

This product's PRIMARY function is: lightweight fermented hydration plus mild tone support. You do NOT need this if you already own a hydrating toner or essence with similar humectants and no ferment-specific goal. Check for an open, unfinished hydrating serum with overlapping ingredients before buying — finish it first to avoid product expiring unused. Stacking assessment: Marginal Benefit if you already run a niacinamide serum (overlapping mechanism); Significant Benefit if your current routine has no ferment or humectant-forward step.

This product is sourced through authorized Korean distributors — primarily Craver Co., Ltd (South Korea), alongside other verified distribution partners. Craver is a major Korean beauty distributor and the parent company of SKIN1004, handling authorized distribution for multiple K-beauty brands. All products are shipped directly to Mauritius via verified channels.

For comprehensive information about how we verify authenticity, our layered verification system, and how to check your product at home, visit our dedicated Authenticity and Trust page.

Genuine COS DE BAHA packaging lists the full ingredient list and net volume in English; the box and bottle should match in batch code. If anything looks mismatched, check the Authenticity page above before use.

Parent Company: JAINA Co., Ltd (CEO Junwon Lee). Founded: 2019. Headquarters: Suwon, South Korea. Manufacturing: contract manufacturing in South Korean laboratories the brand states are MFDS-certified, via a manufacturer described as having 30+ years of industry experience (no single named ODM/OEM factory independently confirmed).

COS DE BAHA positions itself as a value/high-potency actives brand: single-active and combo-active serums at clearly labeled concentrations, sold at accessible prices relative to prestige K-beauty actives brands. Its catalog spans AC/clearing, niacinamide, retinol, tranexamic, and AHA/BHA toner lines in addition to this ferment-led serum, generally built on a consistent Aloe/Propanediol/1,2-Hexanediol aqueous base.

Community reviews for this specific 30ml SKU were not yet available in our research at the time of writing — WebSearch surfaced ingredient-comparison and marketplace listings but no verifiable Reddit, Amazon, or YesStyle review text for this exact product. We will not invent quotes to fill this section; check back as more reviews accumulate.

Does this smell strange? Yes, a faint yeasty/rice-water note is normal for genuine galactomyces ferment filtrate and is not a sign of spoilage.

Can I use this with retinol? Yes — this serum has no active-lane conflict; apply it before your retinol step and moisturizer after.

Will this shrink my pores? No — nothing can physically shrink pore size; this serum can reduce the appearance of debris-stretched pores over time through gentle oil regulation.

Is this suitable for oily skin? Yes, the texture is lightweight and non-greasy based on the confirmed formula.

How is this different from a niacinamide-only serum? This product's primary bulk ingredient is the ferment filtrate itself (brand-stated ~94%), with niacinamide as a smaller supporting active (~2%), versus a dedicated niacinamide serum built around a higher concentration as the lead ingredient.

Galactomyces Ferment Filtrate

The filtered liquid left after fermenting a yeast (Galactomyces), containing amino acids, minerals, and antioxidant compounds.

Niacinamide

A form of Vitamin B3 that supports the skin barrier and evens tone.

Humectant

An ingredient that attracts and holds water in the skin.

Melanosome transfer

The process by which pigment-containing structures move from melanocytes into surface skin cells.

1,2-Hexanediol

A multifunctional ingredient used as a mild preservative-booster and solvent.

MFDS

South Korea's Ministry of Food and Drug Safety, the regulator for cosmetics manufactured there.

Every product sold by Adilsons Beauty is 100% genuine, sourced through authorized Korean distribution channels. Full details on our verification system: Authenticity and Trust.

Our team is available to help you build a routine, troubleshoot reactions, and answer ingredient questions. WhatsApp: +230 5 778 2336.

For in-depth skincare education, visit our blog at adilsons.mu/blogs/k-beauty or subscribe to our email to get our guided education series delivered to your inbox.

Coverage: Island-wide delivery (Mauritius).

Processing and Timing: Orders process in 1-2 business days; usually ready by Day 3 for pickup by our delivery partners/regional team. Partner collection can take up to 1 week. After pickup, delivery typically takes 1-5 business days (weekdays only).

Express: May be available by region; request on WhatsApp: +230 5 778 2336.

Liquids/Sensitive Items: Serums, toners, liquid makeup (and kits containing liquids) are pickup or door-to-door only; checkout enforces this.

Scheduling: Deliveries run by region on set schedules; we will contact you the evening before.

Pickup: Citadelle Mall pickup available.

Returns: No change-of-mind exchanges.

Refunds (Summary): For defective/damaged on receipt (report within 48h), wrong item, or manufacturing defect within 6 months. Refunds via bank transfer (7-10 business days); card refunds may incur a 5% processor fee (fee not charged for defects/order errors). Opened skincare/personal-care items are non-returnable (except if damaged on delivery).

Source of Truth: This is a quick snapshot. If anything differs, the policy pages are final.

Store Policies: For the most up-to-date information, please review our Shipping Policy and Refund Policy.

Best for: anyone wanting a lightweight, fragrance-free daily hydration step with mild tone-evening support, especially as an entry point into fermented-skincare ingredients. Key benefits: simple formula, fast absorption, gentle enough for daily AM and PM use, pairs cleanly with actives. Keep in mind: this is a supporting/hydration product, not a dedicated pigment corrector; the full INCI beyond five ingredients could not be independently verified this pass; no independent reviews for this exact SKU were found yet.

Assessment: Suitable for most treatment-sensitized skin, based on the confirmed formula being fragrance-free, retinoid-free, and built on a minimal-preservative base (1,2-Hexanediol only). Consult your oncology care team before introducing any new skincare products during treatment.

Impact: Supportive. This is a POSTBIOTIC — beneficial metabolites from fermentation. You are not applying live bacteria or yeast. The mild yeasty/rice-water smell is normal and indicates genuine ferment filtrate, not spoilage.