AN Arbutin Niacinamide Serum
AN Arbutin Niacinamide Serum
Product Description
Product overview
A potent K-Beauty brightening serum combining 5% Arbutin and 5% Niacinamide to target hyperpigmentation, dark spots, and uneven skin tone while hydrating with Hyaluronic Acid and soothing botanical extracts for a radiant, even complexion.
Dual Brightening Power
Combines 5% Arbutin and 5% Niacinamide for enhanced skin brightening and dark spot reduction without harsh hydroquinone.
Texture & feel
SENSORYDual Brightening Power
Combines 5% Arbutin and 5% Niacinamide for enhanced skin brightening and dark spot reduction without harsh hydroquinone.
Hydration Boost
Sodium Hyaluronate draws moisture deep into skin layers for plump, supple skin while treating pigmentation.
Botanical Soothing Complex
Green tea, licorice root, and alpine flower extracts calm and protect skin while providing antioxidant benefits.
Barrier Support
Niacinamide strengthens the skin barrier, increases ceramide production, and helps skin retain moisture naturally.
Safety & compatibility
SAFEUse with caution. Arbutin is a natural derivative of hydroquinone. While considered gentler than hydroquinone, limited research exists on its use during pregnancy. Consult your healthcare provider before use. Niacinamide is generally considered safe.
This formula contains no fatty acids, oils, esters, or polysorbates that feed Malassezia yeast. Safe for those prone to fungal acne or pityrosporum folliculitis.
Low comedogenic rating (1/5). Key ingredients like glycerin, niacinamide, and hyaluronic acid have 0 comedogenic ratings. Unlikely to clog pores.
Contains concentrated actives. Cos de BAHA recommends testing under the chin for 24 hours before full application, especially for sensitive skin.
Ingredient breakdown
INGREDIENTSAlpha/Beta Arbutin 5%Proven
A plant-derived compound from bearberry that inhibits tyrosinase enzyme activity to reduce melanin production. Works similarly to hydroquinone but is gentler and considered safer for long-term use.
- Mechanism: Blocks tyrosinase enzyme, preventing melanin synthesis at the source
- Research: Studies show effectiveness in treating pigmentation, age spots, and UV-induced damage
- Synergy: Works well with vitamin C and AHAs for enhanced brightening results
Niacinamide (Vitamin B3) 5%Proven
Multi-functional vitamin that addresses multiple skin concerns simultaneously. Strengthens skin barrier, reduces inflammation, regulates sebum, and fades hyperpigmentation.
- Barrier Function: Increases ceramide synthesis for stronger, more resilient skin
- Brightening: Inhibits melanosome transfer to reduce pigmentation visibility
- Anti-Aging: At 4-5% concentration, shown to reduce wrinkles and fine lines
- Pore Reduction: Regulates oil production and visibly minimizes pore appearance
Sodium Hyaluronate HumectantProven
The salt form of hyaluronic acid that penetrates skin effectively. Attracts and holds up to 1000x its weight in water for deep, lasting hydration.
- Hydration: Draws moisture from the environment into skin layers
- Plumping: Temporarily plumps fine lines by increasing skin hydration
- Compatibility: Works well with all skin types and other active ingredients
Dipotassium Glycyrrhizate (Licorice Root) SoothingPromising
Active compound from licorice root with anti-inflammatory and skin-soothing properties. May help reduce redness and support an even skin tone.
- Anti-Inflammatory: Calms irritated and sensitive skin
- Brightening Support: May inhibit melanin production for additional brightening
- Barrier Repair: Helps strengthen and maintain healthy skin barrier
Allantoin HealingProven
Gentle, non-irritating compound that promotes skin healing, softening, and protection. Commonly used in wound care and sensitive skin formulations.
- Healing: Promotes wound healing and cell regeneration
- Softening: Smooths and softens skin texture
- Protection: Creates protective layer on skin surface
13 ingredients
*Aloe Barbadensis Leaf Extract, Propanediol, Arbutin, Niacinamide, Glycerin, 1,2-Hexanediol, Sodium Hyaluronate, Dipotassium Glycyrrhizate, Allantoin, *Camellia Sinensis Leaf Extract, *Momordica Charantia Fruit Extract, *Sambucus Nigra Flower Extract, *Leontopodium Alpinum Extract
*Organic Ingredients
Where it fits in your routine
ROUTINEApply after toner, before heavier serums or moisturizer. Can be used morning and evening. Always follow with sunscreen during the day as brightening ingredients increase sun sensitivity.
How to use
HOW TO USECleanse & Tone
Start with a clean face. Apply your toner and let it absorb completely before proceeding.
Apply 1-2 Drops
Dispense 1-2 drops into your palm. A little goes a long way with this concentrated formula.
Gently Pat Into Skin
Pat and press the serum onto face and neck. Focus on areas with dark spots or uneven tone. Avoid rubbing.
Wait & Layer
Allow 30-60 seconds for absorption before applying moisturizer. For sensitive skin, consider mixing with another serum or moisturizer.
Who is it for?
WHOPerfect for you if:
- You want to fade dark spots, melasma, or post-acne marks
- You have uneven skin tone or dullness
- You want a hydroquinone-free brightening option
- You need a budget-friendly K-Beauty brightening serum
- You want multi-tasking benefits (brightening + hydration + barrier support)
- You have fungal acne and need a safe formula
Consider alternatives if:
- You are pregnant or breastfeeding (consult doctor first)
- You prefer lightweight, water-thin serums (this has a thicker texture)
- You are extremely sensitive to niacinamide
- You need immediate, dramatic results (brightening takes time)
- You dislike any tackiness in your routine
Skin type compatibility
SKIN TYPESNiacinamide helps regulate sebum production. Some users report slight tackiness, but it absorbs without adding excessive shine. Use sparingly.
Hyaluronic acid and aloe vera base provide excellent hydration. Pairs well with a rich moisturizer on top for extra nourishment.
Balances well across different face zones. Niacinamide helps normalize oil in T-zone while hydrating drier areas.
Contains concentrated actives. Patch test essential. Consider diluting with another serum or starting every other day. Some users report initial irritation.
Non-comedogenic, fungal acne safe formula. Niacinamide helps reduce breakouts and post-acne marks. Great for clearing hyperpigmentation from old acne.
Results timeline
WEEK 12+Initial Hydration Boost
Skin feels more hydrated and slightly more radiant. Some may experience initial adjustment period with mild tingling. This is normal for concentrated serums.
70% noticed improved hydrationSkin Texture Improvement
Skin texture becomes smoother. Overall complexion appears brighter. Niacinamide begins reducing visible pores and regulating oil production.
60% noticed brighter complexionVisible Dark Spot Fading
Noticeable reduction in hyperpigmentation and dark spots. Post-acne marks begin to fade. Skin tone appears more even overall.
55% noticed fading dark spotsSignificant Brightening Results
Maximum brightening benefits visible with consistent use. Melasma and stubborn pigmentation show improvement. Continue use for maintenance.
50% saw significant improvementRatings by platform
6K+ REVIEWSPros & cons
BALANCEDPraised
- Effective 5% arbutin + 5% niacinamide combination
- Budget-friendly price point for K-Beauty quality
- Clean formula - free from parabens, sulfates, fragrance
- Vegan and cruelty-free
- Fungal acne safe formula
- Hydrating without being greasy
- Gentle hydroquinone alternative
- KFDA certified manufacturing
Criticized
- Slightly sticky/tacky texture for some users
- Small 30ml bottle runs out quickly
- Results require 6-12 weeks of consistent use
- May cause irritation for very sensitive skin
- Not pregnancy/breastfeeding friendly
- Dropper packaging less hygienic than pump
Budget-friendly alternatives (dupes)
DUPESHigher concentration arbutin (2% alpha-arbutin) but lacks niacinamide. Thinner, more watery texture. Need to pair with separate niacinamide serum for full benefits.
Higher niacinamide concentration (10%) with added zinc for oil control. No arbutin - less focused on brightening. Best for oily, acne-prone skin.
Toner format with niacinamide, arbutin, and vitamin C derivative. Larger volume (120ml) but lower concentrations. More hydrating, less targeted treatment.
Same brand, different approach. Tranexamic acid targets melasma and stubborn pigmentation. Also contains 5% niacinamide. Consider for hormonal hyperpigmentation.
Comparison with competitors
SIDE-BY-SIDEStorage & shelf life
12 MONTHS12 months after opening. Check expiration date printed on product sticker or bottom of bottle (format: EXP. year.month.day)
Store in a cool, dry place away from direct sunlight. Keep at room temperature. Refrigeration not required but acceptable.
Glass dropper bottle. Some color variation (clear to slightly amber) after opening is normal and does not affect efficacy.
Yes - under 100ml/3.4oz TSA liquid limit. Compact 30ml size fits easily in travel toiletry bag.
Frequently asked questions
FAQUse with caution. Arbutin is a derivative of hydroquinone and, while considered gentler, has limited research on safety during pregnancy and breastfeeding. Most dermatologists recommend avoiding arbutin during these periods as a precaution. Niacinamide is generally considered safe. Always consult your healthcare provider before using any new skincare products while pregnant or breastfeeding.
Yes! This serum is fungal acne safe. The formula contains no fatty acids, oils, esters, or polysorbates that feed Malassezia yeast. Key ingredients like glycerin, niacinamide, and sodium hyaluronate are all safe for those prone to fungal acne or pityrosporum folliculitis.
Yes, but with care. Arbutin and niacinamide are generally compatible with most actives. For retinol: use AN serum in the morning and retinol at night. For vitamin C: they work synergistically for brightening - layer vitamin C first, then AN serum. For AHA/BHA: use on alternate days or different times of day to avoid over-exfoliation. Always introduce new combinations gradually.
This serum works well for all skin types but is especially beneficial for normal, combination, dry, and acne-prone skin. Those with oily skin may find the texture slightly tacky but will benefit from niacinamide's oil-regulating properties. Sensitive skin types should patch test first and may need to dilute the serum or use every other day initially.
Hydration improvements are often noticed within 1-2 weeks. For brightening and dark spot fading, expect to see initial results in 6-8 weeks with consistent twice-daily use. Significant improvement in hyperpigmentation typically occurs around 12 weeks. Individual results vary based on skin type, severity of pigmentation, and consistency of use. Always use sunscreen to maximize and maintain results.
Apply after cleansing and toning, before heavier serums or moisturizer. The order should be: Cleanser → Toner → AN Serum → Other serums (if any) → Moisturizer → Sunscreen (AM). This serum can be used both morning and evening. Wait 30-60 seconds for absorption before applying the next product.
No, this serum has a low comedogenic rating (1/5). The formula is oil-free and contains ingredients with 0 comedogenic ratings like glycerin, niacinamide, and sodium hyaluronate. It's unlikely to clog pores and is suitable for acne-prone skin. Niacinamide may actually help minimize the appearance of pores over time.
The serum has a 12-month PAO (Period After Opening). The expiration date is printed on a sticker or on the bottom of the bottle in the format: EXP. year.month.day. Store in a cool, dry place away from direct sunlight. Some color variation from clear to slightly amber after opening is normal and doesn't affect the product's effectiveness.
Verdict: The Cos De BAHA AN Arbutin Niacinamide Serum delivers solid brightening benefits at an affordable K-Beauty price point. The 5% arbutin and 5% niacinamide combination effectively targets hyperpigmentation without harsh hydroquinone. Clean, fungal acne-safe formula makes it suitable for most skin types. The slightly tacky texture and requirement for consistent 8-12 week use may be drawbacks for some, but for those seeking a budget-friendly, gentle brightening serum with multi-tasking benefits, this is an excellent choice.
Product Overview
Quick product notes are a great way to check if a product is free from commonly avoided ingredients by skincare enthusiasts. These preferences come about for different reasons depending on the ingredient such as personal experiences, sensitivities, health preferences & etc.
Just because a product is not free from a common preference does not mean it's a bad product! You can make a personal decision whether or not you want to use a product that contains these ingredients or not - click the labels of the preference to read more about them.
Quick Product Notes
Ever used a product that promised a certain effect but provided no results? It might not have contained any notable ingredients that could have been responsible for that promised effect. It doesn't matter what the marketing or packaging «promises» it can do, if it doesn't contain anything that can help - then the likelihood of it helping is low.
We help you identify key notable ingredients that have been shown to help with effects such as acne-fighting, brightening, UV-protection, wound healing & anti-aging to help you achieve your skincare goals smarter. Please note that different notable ingredients have varying levels of research behind them, some are extremely well proven yet some have mixed research in their efficacy.
Just because a product doesn't contain any notable ingredients doesn't mean it's bad. And a product with notable ingredients (or even many) doesn't necessarily guarantee the efficacy of the product performing these effects either. There are other factors such as ingredient quality, concentration and formulation that will ultimately determine this.
Be smart and use this as just a starting point for you to make more informed and smarter choices and compare it with reviews to see if the product is right for you
Notable Effects & Ingredients
Why are some products great for some people and horrible for others? Well everyone has different skin types and different reactions to the same ingredients.
We've identified a range of ingredients that are commonly regarded as potentially good or bad for those with Dry, Oily/Acne-Prone or Sensitive skin.
A product that contains good or bad ingredients for your skin type doesn't always flat out make the entire product good or bad for your skin. There are other factors such as ingredient quality, concentration and formulation that will ultimately determine your skins reaction.
One of the best ways to use this section is to troubleshoot products you've had bad experiences with in the past. Check if it contains any of the marked ingredients to point out suspect ingredients to avoid in the future!
Ingredients Related to Skin Types
Ingredient Safety Breakdown refers to the percentage % of ingredients in different risk categories as classified by EWG (Environment Working Group) if they are available. There are almost endless cosmetic ingredients and they are one of the few organisations globally that have assigned ratings to a lot of the more commonly used ingredients which is why we reference them.
EWG is seen by many to be more on the alarmist side in their assignment of health ratings resulting in rating ingredients as riskier than they actually are. We recommend using this a reference point rather than a strict guide of ingredient safety and to always do further research if into ingredients that you may find suspect.
Ingredient Safety Breakdown
Product ingredient list
| EWG | CIR | Ingredient Name & Cosmetic Functions | Notes |
|---|---|---|---|
| 0 |
Aloe Barbadensis Leaf Extract
Emollient, Humectant, Skin Conditioning
|
Hydrating
Redness
Irritation
|
|
| 1 |
Propanediol
Solvent, Viscosity Controlling, Viscosity Decreasing Agent
|
|
|
| 1 |
Arbutin
Skin Conditioning, Antioxidant, Bleaching
|
Promotes Wound Healing
Dark Spots
|
|
| 1 |
Niacinamide
Skin Conditioning, Hair Conditioning, Smoothing
|
Promotes Wound Healing
Redness
Irritation
Dark Spots
Pores
|
|
| 2 |
Glycerin
Solvent, Perfuming, Fragrance, Humectant, Viscosity Decreasing Agent, Hair Conditioning, Skin Protecting, Denaturant, Skin Conditioning
|
Promotes Wound Healing
Hydrating
|








