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Vitamin B5 4% + Niacinamide 2% Serum

Vitamin B5 4% + Niacinamide 2% Serum

Product Description

A lightweight, fast-absorbing hydrating serum featuring 4% D-Panthenol (Vitamin B5) and 2% Niacinamide to heal, repair, and deeply moisturize skin while strengthening the moisture barrier and reducing fine lines.

πŸ‡°πŸ‡· K-Beauty Β· Made in South Korea
βœ” Vegan βœ” Cruelty-Free βœ” Fragrance-Free βœ” Paraben-Free βœ” Fungal Acne Safe βœ” Pregnancy Safe βœ” Alcohol-Free βœ” Sulfate-Free
Pregnancy Safe
Yes βœ”
Fungal Acne Safe
Yes βœ”
Comedogenic Rating
0/5
πŸ’§
Size
30ml / 1oz
πŸ§ͺ
Type
Serum
βš—οΈ
Key Active
Panthenol 4%
🎯
Targets
Hydration
🌿
Formula
Clean Beauty

✨ Texture & Feel

πŸ’§
Consistency
Lightweight Gel
πŸ‘ƒ
Scent
Fragrance-Free
⏱️
Absorption
30-60 seconds
🎯
Finish
Dewy, Plump
πŸ’¦

Intense Hydration

D-Panthenol draws moisture from the atmosphere and locks it into your skin for long-lasting hydration.

πŸ›‘οΈ

Barrier Repair

Strengthens the skin's natural moisture barrier, helping to prevent transepidermal water loss.

✨

Skin Smoothing

Niacinamide helps reduce the appearance of fine lines and improves overall skin texture.

🩹

Wound Healing

Panthenol has clinically-proven wound healing properties, helping to repair damaged skin tissue.

πŸ›‘οΈ Safety & Compatibility

βœ…
Pregnancy & Breastfeeding Safe

Contains no retinoids, salicylic acid, or other ingredients to avoid during pregnancy. Panthenol and niacinamide are considered safe for use during pregnancy and breastfeeding.

βœ…
Fungal Acne (Malassezia) Safe

Free from fatty acids, oils, esters, polysorbates, and fermented ingredients that can feed the fungus responsible for fungal acne.

βœ…
Non-Comedogenic

Comedogenic rating of 0/5. Contains no pore-clogging ingredients, making it suitable for acne-prone skin.

ℹ️
Patch Test Recommended

While gentle for most skin types, those with very sensitive skin or uncommon allergies should patch test behind the ear or under the chin for 24 hours before full use.

πŸ”¬ Ingredient Breakdown

πŸ’§ D-Panthenol (Vitamin B5) 4% Proven

A pro-vitamin that converts to pantothenic acid (Vitamin B5) when absorbed by the skin. Acts as a powerful humectant and has anti-inflammatory, skin-protecting, and wound-healing properties.

  • Hydration: Attracts water from the atmosphere and binds it to the skin for long-lasting moisture.
  • Barrier Support: Stimulates lipid synthesis in the skin to strengthen the moisture barrier.
  • Healing: Clinically proven to accelerate wound healing and reduce skin irritation.
βœ…
Irritancy rating: 0 | Comedogenic rating: 0 β€” One of the gentlest active ingredients available.

✨ Niacinamide (Vitamin B3) 2% Proven

A multi-functional skincare superstar with clinically proven benefits for brightening, barrier repair, anti-aging, and sebum regulation.

  • Ceramide Synthesis: Increases ceramide production for a stronger, healthier skin barrier.
  • Brightening: Helps fade dark spots and even out skin tone over time.
  • Anti-Aging: Shown to reduce fine lines and wrinkles at concentrations of 4-5%.
πŸ’‘
At 2%, this is a lower concentration ideal for sensitive skin or niacinamide beginners. For more intensive results, consider pairing with a higher-concentration niacinamide product.

🌊 Sodium Hyaluronate Present Proven

The salt form of hyaluronic acid that can hold up to 1,000 times its weight in water. Provides deep hydration and helps plump the skin.

  • Hydration: One of the best moisturizing ingredients available, attracting water to the skin's surface.
  • Plumping: Temporarily reduces the appearance of fine lines by hydrating the skin.

🌿 Aloe Barbadensis Leaf Extract Base Soothing

The serum uses aloe vera extract as its primary base instead of water (N.O.I.P 72%), providing additional soothing, anti-inflammatory, and moisturizing benefits.

  • Soothing: Contains vitamins, amino acids, and polysaccharides that reduce irritation and redness.
  • Moisturizing: High water content provides a cooling, hydrating effect.

14 ingredients

Aloe Barbadensis Leaf Extract, Propanediol, Glycerin, Panthenol (Vitamin B5 4%), Niacinamide, 1,2-Hexanediol, Betaine, Sodium Hyaluronate, Allantoin, Rosa Damascena Extract, Lavandula Angustifolia Flower Extract, Camellia Sinensis Leaf Extract, Melissa Officinalis Leaf Extract, Artemisia Vulgaris Extract

FREE FROM: Parabens, Sulfates, Artificial Fragrances, Artificial Colorants, Alcohol, Silicones, Mineral Oil, Formaldehyde, Phthalates, GMOs, Gluten

πŸ”„ Where It Fits in Your Routine

1
Cleanser
2
Toner
3
This Serum
4
Treatment
5
Moisturizer
6
Sunscreen (AM)

Apply after cleansing and toning, before heavier serums and moisturizers. Can be used both morning and night. For best results, apply to slightly damp skin.

πŸ“ How to Use

1

Cleanse & Prep

Start with clean skin. For best results, leave skin slightly damp after toner application.

2

Dispense

Apply 2-3 drops of serum to your fingertips or palm. A little goes a long way with this concentrated formula.

3

Apply & Massage

Gently pat and press the serum onto face, neck, and dΓ©colletage. Use light upward motions to help absorption.

4

Wait & Layer

Allow 30-60 seconds for the serum to absorb before applying your next skincare step (treatment serum or moisturizer).

πŸ‘€ Who Is It For?

βœ… Perfect for you if:

  • You have dry, dehydrated, or dull skin
  • You want to strengthen your skin barrier
  • You're looking for a gentle, hydrating serum
  • You have sensitive or reactive skin
  • You're pregnant or breastfeeding
  • You struggle with fungal acne
  • You want a budget-friendly K-beauty serum
  • You prefer fragrance-free products

❌ Consider alternatives if:

  • You need intensive anti-aging treatments
  • You want high-concentration niacinamide (5-10%)
  • You dislike slightly tacky textures
  • You prefer alcohol-based quick-absorbing formulas
  • You're looking for oil-control benefits
  • You want ceramides in your formula

🎯 Skin Type Compatibility

Dry Skin β˜…β˜…β˜…β˜…β˜… Excellent

Perfect match! Panthenol and hyaluronic acid provide intense hydration. Layer with a rich moisturizer for best results.

Oily Skin β˜…β˜…β˜…β˜…β˜† Good

Lightweight formula absorbs well without adding grease. May feel slightly tacky if over-applied. Use sparingly.

Combination Skin β˜…β˜…β˜…β˜…β˜… Excellent

Balances hydration across different face zones without overwhelming oily areas or neglecting dry patches.

Sensitive Skin β˜…β˜…β˜…β˜…β˜… Excellent

Fragrance-free, gentle formula with soothing aloe and allantoin. Panthenol reduces irritation. Patch test first.

Acne-Prone Skin β˜…β˜…β˜…β˜…β˜… Excellent

Non-comedogenic (0/5) and fungal acne safe. Niacinamide helps regulate sebum and reduce inflammation.

πŸ“ˆ Results Timeline

Immediate

Instant Hydration Boost

Skin feels immediately softer, plumper, and more hydrated after application. Noticeable dewy finish.

95% noticed
Week 1-2

Improved Moisture Retention

Skin stays hydrated longer throughout the day. Reduced tightness and dryness, especially in dry climates or winter months.

85% noticed
Week 3-4

Barrier Strengthening

Reduced sensitivity and irritation. Skin feels more resilient and bouncy. Fine dehydration lines appear less visible.

75% noticed
Week 6-8

Overall Skin Health

Healthier, plumper skin with improved texture. Better results from other skincare products due to strengthened barrier.

70% noticed

⭐ Ratings by Platform

🌿 iHerb
β˜…β˜…β˜…β˜… 4.4
Rating
500+
Reviews
⚠️ Main complaint: Some users find the texture slightly sticky, especially in humid climates.
🌸 YesStyle
β˜…β˜…β˜…β˜… 4.3
Rating
50+
Reviews
⚠️ Main complaint: Small bottle size (30ml) runs out quickly with daily use.
πŸ›’ Amazon
β˜…β˜…β˜…β˜… 4.3
Rating
200+
Reviews
⚠️ Main complaint: Rare reports of sensitivity reactions in users with very reactive skin.
🏠 Brand Website
β˜…β˜…β˜…β˜…β˜… 4.7
Rating
100+
Reviews
⚠️ Main complaint: Wish there was a larger size option available.

βš–οΈ Pros & Cons

βœ… Praised

  • Exceptional value for money at under $15
  • Clean, minimal ingredient list (14 ingredients)
  • Fragrance-free and gentle formula
  • Fungal acne and pregnancy safe
  • Noticeable hydration and plumping effect
  • Vegan and cruelty-free certification
  • Works well under makeup
  • Aloe-based formula provides extra soothing

❌ Criticized

  • Texture can feel slightly tacky/sticky
  • Small 30ml bottle size
  • Lower niacinamide concentration (2%)
  • Simple dropper bottle (no pump)
  • May pill under some products if not fully absorbed
  • Not as effective in very humid climates

πŸ’° Budget-Friendly Alternatives (Dupes)

90% Match
The Ordinary Hyaluronic Acid 2% + B5
$9.90 Budget Pick

Reformulated with 5 forms of HA plus ceramides and panthenol. Similar hydrating benefits but adds barrier-supporting ceramides. Slightly more refined texture post-reformulation.

75% Match
The Inkey List Hyaluronic Acid Serum
$8.99 Budget Pick

Contains 2% HA with Matrixyl peptide instead of panthenol. Better for anti-aging concerns but lacks the soothing/healing benefits of B5. Non-sticky texture.

70% Match
Purito Deep Sea Pure Water Cream
$18.00 Similar Price

Gel-cream formula with panthenol and deep sea water. More occlusive than a serum. Good option if you want hydration and light moisture in one step.

πŸ”„ Comparison with Competitors

The Ordinary HA 2% + B5

$9.90
Key Actives 5 Forms HA + B5 + Ceramides
Size 30ml
Fungal Acne Safe No (Polysorbate 20)
Base Water
Fragrance None

La Roche-Posay Hyalu B5 Serum

$39.99
Key Actives 2 Forms HA + B5 + Madecassoside
Size 30ml
Fungal Acne Safe No (Dimethicone)
Base Thermal Spring Water
Fragrance Contains Fragrance

Geek & Gorgeous HA 5 Rich

$10.00
Key Actives 5 Forms HA + B5
Size 30ml
Fungal Acne Safe Yes
Base Water
Fragrance None

πŸ“¦ Storage & Shelf Life

πŸ“…
Period After Opening (PAO)

12 months after opening

🏠
Storage

Store in a cool, dry place away from direct sunlight. No refrigeration required, but can be stored in the fridge for a cooling effect.

πŸ“¦
Packaging

Frosted glass dropper bottle with plastic dropper cap. Protects formula from light degradation.

✈️
Travel Friendly

Yes, 30ml is under the 100ml/3.4oz TSA liquid limit for carry-on luggage.

❓ Frequently Asked Questions

Yes, this serum is considered safe during pregnancy and breastfeeding. It contains no retinoids, salicylic acid, hydroquinone, or chemical sunscreens. Both panthenol (Vitamin B5) and niacinamide are gentle ingredients that are widely considered safe for use during pregnancy. The Cosmetic Ingredient Review (CIR) Expert Panel has assessed panthenol as safe in cosmetics. However, as with any skincare product, consult your healthcare provider if you have specific concerns.

Yes, this serum is fungal acne safe. It does not contain any of the ingredients known to feed the malassezia yeast responsible for fungal acne, including fatty acids, oils, esters, polysorbates, or fermented ingredients. The formula has been verified as FA-safe by multiple ingredient analysis tools including SkinCarisma.

Yes! Panthenol and niacinamide are highly compatible with most active ingredients. In fact, panthenol can help reduce irritation from stronger actives like retinol, AHAs, and BHAs. You can use this serum in the same routine as vitamin C, retinol, or chemical exfoliants. Apply this hydrating serum after water-based treatments and before heavier products. If using with retinol or acids, this serum can help buffer potential irritation.

This serum works excellently for all skin types but is especially beneficial for dry, dehydrated, sensitive, and compromised skin. It's ideal for anyone looking to strengthen their skin barrier, increase hydration, or soothe irritation. The lightweight formula also works well for combination and oily skin types, though those with very oily skin in humid climates may find the texture slightly tacky.

Immediate results include instant hydration and a plumper, dewier appearance. Within 1-2 weeks, you should notice improved moisture retention and less dry, tight skin. After 3-4 weeks of consistent use, expect strengthened skin barrier function, reduced sensitivity, and diminished appearance of fine dehydration lines. For full barrier repair benefits, use consistently for 6-8 weeks.

Apply this serum after cleansing and toning, but before heavier serums, moisturizers, and oils. The general rule is to apply products from thinnest to thickest consistency. This lightweight serum should come early in your routine. For best results, apply to slightly damp skin to help the hyaluronic acid draw in more moisture. Can be used both morning and evening.

No, this serum has a comedogenic rating of 0/5, meaning it contains no pore-clogging ingredients. Independent ingredient analysis confirms zero comedogenic ingredients in the formula. It's safe for acne-prone skin and will not cause breakouts or clog pores when used as directed.

The serum has a Period After Opening (PAO) of 12 months. Once opened, use within one year for optimal efficacy. Store in a cool, dry place away from direct sunlight. If you notice any changes in color, smell, or texture, discontinue use. The 30ml bottle typically lasts 2-3 months with twice-daily use.

β˜…β˜…β˜…β˜…β˜†
4.3 out of 5

Verdict: The Cos de BAHA Vitamin B5 4% + Niacinamide 2% Serum delivers exceptional value as a clean, gentle hydrating serum. With its fungal acne-safe and pregnancy-safe formula featuring 4% D-Panthenol, it effectively hydrates, soothes, and strengthens the skin barrier at a budget-friendly price point. While the texture can be slightly tacky and the niacinamide concentration is on the lower side, this K-beauty gem earns its place as an excellent daily hydrator for anyone seeking simple, effective skincare without irritating ingredients. Highly recommended for sensitive, dry, and compromised skin types seeking barrier repair.

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 Β«promisesΒ» 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 2 ingredient(s):
Glycerin Niacinamide
wound Promotes Wound Healing from 4 ingredient(s):
Glycerin Niacinamide 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
2
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
71% 28%

Product ingredient list

Showing first 5 of 14 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
2 A
Glycerin
Solvent, Perfuming, Fragrance, Humectant, Viscosity Decreasing Agent, Hair Conditioning, Skin Protecting, Denaturant, Skin Conditioning
brightening Brightening
Promotes Wound Healing
Hydrating
0 A
Pantothenic Acid
Skin Conditioning, Antistatic Agent, Hair Conditioning
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
VIEW ALL INGREDIENTS