COS DE BAHA Galactomyces Serum 30ml

COS DE BAHA Galactomyces Serum is a 30ml fermented-yeast essence-serum built around Galactomyces Ferment Filtrate (brand-stated 94%) with Niacinamide (brand-stated 2%), designed to hydrate, refine visible pore size, and gently even tone. Biologically, the ferment filtrate delivers amino acids, minerals, and vitamins that support the skin’s moisture barrier while niacinamide reduces melanosome transfer and modulates oil. In Mauritius’s humidity, it feels like a watery, slightly tacky “rice-water” layer rather than a rich cream. Do not use if you are reacting to any yeast/ferment ingredient or currently patch-testing a new fragrance-free routine introduce this alone first.

At-a-Glance (Is this for you?)

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).

Attribute	Detail
Brand	COS DE BAHA
Product Type	Essence-serum
Net Volume	30ml
Key Actives	Galactomyces Ferment Filtrate (~94%), Niacinamide (~2%)
Skin Types	All, especially dull/dehydrated/uneven tone
Primary Concern	Dullness, enlarged pore appearance, mild unevenness
AM/PM	Both
Routine Complexity	Straightforward
MFDS Classification	Not publicly confirmed

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.

Age and Tween Suitability (Parental Guide)

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.

Low-Energy and Burnout Viability (For tough days)

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.

Quick Start (60-Second Essentials)

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.

AM Routine Guide (Morning sequence)

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.

PM Routine Guide (Evening sequence)

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.

How to Use (Amounts, technique, and tips)

Area	Amount	Pumps (estimate)
Full face	3-5 drops	~1 pump if pump-dispensed (estimate)

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).

Routine Encyclopedia (Where every product type fits)

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.

Viscosity and Layering Science (Where it fits)

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.

What to Expect (Results timeline)

Phase	Timeframe	What You Will Notice
Immediate	0-24h	A temporary hydrated, slightly dewy look not structural change
Adjustment	Week 1-2	Skin adapting; discontinue if burning persists beyond 30 seconds
Epidermal Turnover	Week 4-6	Improved hydration retention, subtler tone unevenness, one full turnover cycle
Maintenance	Ongoing	Results stabilize with continued use; do not increase dosage chasing more

Who Should Use This (Clinical triage)

Tier	Criteria
PROCEED IF	Barrier intact, no active eczema flare, general dullness/dehydration/mild unevenness
PAUSE IF	Currently reacting to a new fragrance/ferment ingredient elsewhere in your routine
STOP/CONSULT IF	Known allergy to fermented/yeast-derived skincare ingredients

Skin Type Compatibility

Skin Type	Compatibility	Notes
Oily	Good	Lightweight, won’t add heaviness
Dry	Good	Layer under a richer moisturizer, may need a second humectant layer
Combination	Good	Even application across the face
Sensitive	Generally good	Fragrance-free; patch test first for ferment sensitivity

Targeted Concerns (What it treats)

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.

Best Paired With (Synergistic pairings)

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.

Wudu and Prayer Compatibility

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 Replacement (Common misconceptions)

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.

Climate Fit for Mauritius

Season	Conditions	Adjustment
Summer (Dec-Mar)	Hot, humid	Use as-is; skin may need fewer layers overall
Winter (Jun-Sep)	Drier, cooler	Layer a second hydrating step or richer moisturizer after
Cyclone season (Jan-Mar)	High humidity swings	Keep routine simple; this serum plus SPF is enough some days

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.

Complete Ingredient Transparency

Ingredient	Concentration	Evidence Grade	Mechanism	Source
Galactomyces Ferment Filtrate	~94% (brand-stated)	Emerging*	Delivers amino acids, minerals, and antioxidant metabolites from fermentation	Fermentation
Niacinamide	~2% (brand-stated)	Strong	Inhibits melanosome transfer, supports barrier lipids	Synthetic

*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).

Allergens and Fragrance Disclosure

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.

Conscious and Permissible Formulation

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.

Evidence, Regulation and Claims

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.

Product Identity and Provenance

Field	Detail
Brand	COS DE BAHA
Product Line	“GN” internal line code (Galactomyces + Niacinamide)
Country of Manufacture	South Korea (brand-stated, MFDS-certified facility)
Net Volume	30ml
PAO	Not publicly disclosed check the printed jar symbol

Sensory and Chemical Profile

Attribute	Detail
Texture	Watery essence-serum
Viscosity	Water-thin
pH	Not publicly disclosed
Absorption	Fast, under 60 seconds
Finish	Dewy, slightly tacky until fully absorbed

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.

Pilling Risk and Texture Mechanics

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.

Stability, Spoilage and Oxidation

Fresh color: clear to pale straw. Storage: keep out of direct bathroom-window sun and away from prolonged heat above roughly 30C; 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.

Safety and Patch Test Protocol

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.

Troubleshooting Guide

If You Experience	Likely Cause	Solution
Mild tingling on first use	Ferment sensitivity or over-application	Reduce to every other day, patch test again
No visible change after 8 weeks	Concern may need a stronger dedicated active	Consider a higher-% niacinamide or targeted brightening serum
Increased oiliness	Usually unrelated check if a cleanser upstream is stripping	Review cleanser pH, don’t over-wash
Smell changed to sour/off	Possible spoilage	Discard

Common Mistakes to Avoid

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.

Usage Economics (How long it lasts)

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.

Complete Your Routine (Exact routine + pairings)

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.

Is This the Best Choice? (Mindful alternatives)

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.

The No-Buy Redundancy Check

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.

Sourcing and Authenticity

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.

About COS DE BAHA

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.

Genuine Community Experiences

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.

Packaging and Practical Details

Attribute	Detail
Primary Packaging	Glass or PET bottle, brand-standard for this serum line
Closure	Dropper or pump (check your unit)
Hygiene Rating	Good dropper/pump limits air and finger contact
Travel-Friendly	Yes, 30ml is under most carry-on liquid limits

Frequently Asked Questions

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.

GlossaryGalactomyces Ferment FiltrateThe filtered liquid left after fermenting a yeast (Galactomyces), containing amino acids, minerals, and antioxidant compounds.NiacinamideA form of Vitamin B3 that supports the skin barrier and evens tone.HumectantAn ingredient that attracts and holds water in the skin.Melanosome transferThe process by which pigment-containing structures move from melanocytes into surface skin cells.1,2-HexanediolA multifunctional ingredient used as a mild preservative-booster and solvent.MFDSSouth Korea’s Ministry of Food and Drug Safety, the regulator for cosmetics manufactured there.The Adilsons Promise

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.

Delivery and Returns Mauritius

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; che