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AN Arbutin Niacinamide Serum

AN Arbutin Niacinamide Serum

Product Description

Product overview

Made in Various INTERNATIONAL

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.

Vegan Cruelty-Free Fragrance-Free Paraben-Free Sulfate-Free Alcohol-Free Silicone-Free KFDA Certified
Pregnancy
Caution
Fungal Acne
Yes
Comedogenic
1/5
Size
30ml / 1 fl oz
Skin Type
All Skin Types
Key Actives
Arbutin + Niacinamide
Concentration
5% + 5%
Formula
74% Organic
Real reviews · YouTube Shorts
Why it's different

Dual Brightening Power

Combines 5% Arbutin and 5% Niacinamide for enhanced skin brightening and dark spot reduction without harsh hydroquinone.

01

Texture & feel

SENSORY
Consistency
Slightly Viscous Serum
Scent
Fragrance-Free
Absorption
30-60 Seconds
Finish
Hydrated / Dewy

Dual 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.

02

Safety & compatibility

SAFE
Pregnancy & Breastfeeding

Use 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.

Fungal Acne (Malassezia) 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.

Non-Comedogenic

Low comedogenic rating (1/5). Key ingredients like glycerin, niacinamide, and hyaluronic acid have 0 comedogenic ratings. Unlikely to clog pores.

Patch Test Recommended

Contains concentrated actives. Cos de BAHA recommends testing under the chin for 24 hours before full application, especially for sensitive skin.

03

Ingredient breakdown

INGREDIENTS

Alpha/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
Hydroquinone alternative - effective brightening without the harsh side effects or health concerns associated with hydroquinone use.

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

FREE FROM: Parabens, Sulfates, Artificial Fragrances, Alcohol, Silicones, Oils, Mineral Oil, Hydroquinone, Colorants, Phthalates, Formaldehyde, PEGs
04

Where it fits in your routine

ROUTINE
1
Cleanser
2
Toner
3
AN Serum
4
Moisturizer
5
Sunscreen (AM)

Apply 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.

05

How to use

HOW TO USE
1

Cleanse & Tone

Start with a clean face. Apply your toner and let it absorb completely before proceeding.

2

Apply 1-2 Drops

Dispense 1-2 drops into your palm. A little goes a long way with this concentrated formula.

3

Gently Pat Into Skin

Pat and press the serum onto face and neck. Focus on areas with dark spots or uneven tone. Avoid rubbing.

4

Wait & Layer

Allow 30-60 seconds for absorption before applying moisturizer. For sensitive skin, consider mixing with another serum or moisturizer.

06

Who is it for?

WHO

Perfect 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
07

Skin type compatibility

SKIN TYPES
Oily Skin
Good

Niacinamide helps regulate sebum production. Some users report slight tackiness, but it absorbs without adding excessive shine. Use sparingly.

Dry Skin
Excellent

Hyaluronic acid and aloe vera base provide excellent hydration. Pairs well with a rich moisturizer on top for extra nourishment.

Combination Skin
Excellent

Balances well across different face zones. Niacinamide helps normalize oil in T-zone while hydrating drier areas.

Sensitive Skin
Moderate

Contains concentrated actives. Patch test essential. Consider diluting with another serum or starting every other day. Some users report initial irritation.

Acne-Prone Skin
Excellent

Non-comedogenic, fungal acne safe formula. Niacinamide helps reduce breakouts and post-acne marks. Great for clearing hyperpigmentation from old acne.

08

Results timeline

WEEK 12+
Week 1-2

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 hydration
Week 3-4

Skin Texture Improvement

Skin texture becomes smoother. Overall complexion appears brighter. Niacinamide begins reducing visible pores and regulating oil production.

60% noticed brighter complexion
Week 6-8

Visible 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 spots
Week 12+

Significant Brightening Results

Maximum brightening benefits visible with consistent use. Melasma and stubborn pigmentation show improvement. Continue use for maintenance.

50% saw significant improvement
09

Ratings by platform

6K+ REVIEWS
Amazon
4.3
Rating
5,000+
Reviews
Main complaint: Sticky texture takes time to absorb for some users
iHerb
4.6
Rating
800+
Reviews
Main complaint: Small bottle size (30ml) runs out quickly
YesStyle
4.4
Rating
200+
Reviews
Main complaint: Results take time, requires patience
Stylevana
4.5
Rating
150+
Reviews
Main complaint: May cause irritation for very sensitive skin
10

Pros & cons

BALANCED

Praised

  • 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
11

Budget-friendly alternatives (dupes)

DUPES
85% Match
Alpha Arbutin 2% + HA
$10.90
Budget Pick

Higher concentration arbutin (2% alpha-arbutin) but lacks niacinamide. Thinner, more watery texture. Need to pair with separate niacinamide serum for full benefits.

80% Match
Niacinamide 10% + Zinc 1%
$6.50
Budget Pick

Higher niacinamide concentration (10%) with added zinc for oil control. No arbutin - less focused on brightening. Best for oily, acne-prone skin.

75% Match
Niacinamide Brightening Toner
$14.00
Similar

Toner format with niacinamide, arbutin, and vitamin C derivative. Larger volume (120ml) but lower concentrations. More hydrating, less targeted treatment.

70% Match
Tranexamic Acid 5% Serum with Niacinamide 5%
$14.99
Same Brand

Same brand, different approach. Tranexamic acid targets melasma and stubborn pigmentation. Also contains 5% niacinamide. Consider for hormonal hyperpigmentation.

12

Comparison with competitors

SIDE-BY-SIDE
Alpha Arbutin 2% + HA
Key Actives Alpha Arbutin 2%
Size 30ml
Texture Lightweight
Fragrance None
Fungal Acne Safe No (contains PEG-40)
Discoloration Correcting Serum
Key Actives Tranexamic 3% + Niacinamide
Size 30ml
Texture Lightweight
Fragrance None
Fungal Acne Safe Yes
Alpha Arbutin Serum 2%
Key Actives Alpha Arbutin 2% + HA
Size 30ml
Texture Lightweight
Fragrance None
Fungal Acne Safe Check formula
13

Storage & shelf life

12 MONTHS
Period After Opening (PAO)

12 months after opening. Check expiration date printed on product sticker or bottom of bottle (format: EXP. year.month.day)

Storage

Store in a cool, dry place away from direct sunlight. Keep at room temperature. Refrigeration not required but acceptable.

Packaging

Glass dropper bottle. Some color variation (clear to slightly amber) after opening is normal and does not affect efficacy.

Travel Friendly

Yes - under 100ml/3.4oz TSA liquid limit. Compact 30ml size fits easily in travel toiletry bag.

13

Frequently asked questions

FAQ

Use 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.

— Skincarisma verdict
4.3 / 5 ★★★★☆

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

question
lightbulb What are Quick Product Notes?

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.

muscle Pro Tip Alert!

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.

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Quick Product Notes

Click on icons for more information
question
lightbulb What are Notable Effects & Ingredients?

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.

muscle Pro Tip Alert!

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

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Notable Effects & Ingredients

anti-aging Anti-Aging from 2 ingredient(s):
Niacinamide Camellia Sinensis Leaf Extract
brightening Brightening from 3 ingredient(s):
Arbutin Niacinamide Glycerin
wound Promotes Wound Healing from 5 ingredient(s):
Arbutin Niacinamide Glycerin Sodium Hyaluronate Allantoin
ache Ache-fighting from 1 ingredient(s):
Niacinamide
question
lightbulb What are Ingredients Related to Skin Type?

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.

muscle Pro Tip Alert!

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!

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Ingredients Related to Skin Types

Click on icons for more information
dry-skin Dry Skin
3
oily-skin Oily/Acne-Prone Skin
2
sensitive-skin Sensitive Skin
1
question
lightbulb What is the Ingredient Safety Breakdown?

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.

muscle Pro Tip Alert!

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.

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Ingredient Safety Breakdown

EWG Health Ratings
Low risk
Medium risk
High risk
Unknown risk
69% 30%

Product ingredient list

Showing first 5 of 13 ingredients
EWG CIR Ingredient Name & Cosmetic Functions Notes
0 Unknown
Aloe Barbadensis Leaf Extract
Emollient, Humectant, Skin Conditioning
Hydrating
Redness
Irritation
1 Unknown
Propanediol
Solvent, Viscosity Controlling, Viscosity Decreasing Agent
1 Unknown
Arbutin
Skin Conditioning, Antioxidant, Bleaching
brightening Brightening
Promotes Wound Healing
Dark Spots
1 A
Niacinamide
Skin Conditioning, Hair Conditioning, Smoothing
brightening Brightening
ache Ache-fighting
anti-aging Anti-Aging
Promotes Wound Healing
Redness
Irritation
Dark Spots
Pores
2 A
Glycerin
Solvent, Perfuming, Fragrance, Humectant, Viscosity Decreasing Agent, Hair Conditioning, Skin Protecting, Denaturant, Skin Conditioning
brightening Brightening
Promotes Wound Healing
Hydrating
VIEW ALL INGREDIENTS