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Gentle Vitamin C Serum

Gentle Vitamin C Serum

Product Description

Product overview

Made in Various INTERNATIONAL

A gentle, beginner-friendly vitamin C serum formulated with stable 3-O-Ethyl Ascorbic Acid and Niacinamide. Designed for sensitive skin, this lightweight serum brightens dull complexions, fades dark spots, and improves skin tone without irritation or stickiness. Infused with 20% Hippophae Rhamnoides (Sea Buckthorn) Fruit Extract for powerful antioxidant protection.

Vegan Cruelty-Free Fragrance-Free Alcohol-Free Paraben-Free Silicone-Free Reef Safe Sensitive Skin Friendly
Pregnancy
Yes
Fungal Acne
Caution
Comedogenic
1/5
Size
30ml / 1.01 fl oz
Product Type
Serum
Main Concern
Brightening
Key Active
Vitamin C + Niacinamide
Best Used
AM & PM
Real reviews · YouTube Shorts
Why it's different

Stable Vitamin C Derivative

3-O-Ethyl Ascorbic Acid is more stable than pure L-Ascorbic Acid, won't oxidize quickly, and converts to active vitamin C within skin layers for gentle yet effective brightening.

01

Texture & feel

SENSORY
Consistency
Watery-Gel
Scent
Fragrance-Free
Absorption
20-30 seconds
Finish
Hydrated, Non-Sticky

Stable Vitamin C Derivative

3-O-Ethyl Ascorbic Acid is more stable than pure L-Ascorbic Acid, won't oxidize quickly, and converts to active vitamin C within skin layers for gentle yet effective brightening.

20% Sea Buckthorn Extract

Hippophae Rhamnoides Fruit Extract contains 3.2x more vitamin C than lemons and provides powerful antioxidant protection against environmental damage.

Niacinamide Complex

Vitamin B3 works synergistically with vitamin C to control sebum, minimize pores, strengthen skin barrier, and fade hyperpigmentation.

Oil Capsule Technology

Innovative delivery system provides deep hydration with a watery, non-sticky texture that absorbs quickly without yellowing or unpleasant odors.

02

Safety & compatibility

SAFE
Pregnancy & Breastfeeding Safe

No retinoids, salicylic acid, hydroquinone, or chemical sunscreens. All ingredients are considered safe during pregnancy and nursing.

Fungal Acne - Use Caution

Contains Bifida Ferment Filtrate and Castor Oil/IPDI Copolymer. While Bifida is a bacteria (not yeast), those with severe fungal acne may want to patch test first.

Low Comedogenic Rating (1/5)

Water-based formula with minimal pore-clogging ingredients. Suitable for acne-prone skin types.

Sensitive Skin Approved

Gentle vitamin C derivative (3-O-Ethyl Ascorbic Acid) has optimal pH of 4-5.5, much less irritating than pure L-Ascorbic Acid.

03

Ingredient breakdown

INGREDIENTS

3-O-Ethyl Ascorbic AcidProven

A stable, water and oil-soluble vitamin C derivative that penetrates skin effectively and converts to pure ascorbic acid within the skin. More gentle than L-Ascorbic Acid while delivering similar brightening and antioxidant benefits.

  • Stability: Remains stable at pH 4-5.5, doesn't oxidize or turn yellow like pure vitamin C
  • Research: Studies show 2% concentration can improve skin tone and reduce hyperpigmentation
  • Mechanism: Inhibits tyrosinase activity by 89.1%, reducing melanin production
Ideal for vitamin C beginners or those who couldn't tolerate L-Ascorbic Acid serums

NiacinamideProven

Multitasking vitamin B3 that strengthens skin barrier, regulates sebum production, minimizes pores, and brightens skin. Works synergistically with vitamin C for enhanced results.

  • Barrier Support: Increases ceramide production to strengthen skin's natural defenses
  • Oil Control: Clinically shown to reduce sebum production in oily skin
  • Brightening: Inhibits melanosome transfer to reduce hyperpigmentation

Hippophae Rhamnoides Fruit Water 20%Promising

Sea Buckthorn extract rich in vitamins C, E, and omega fatty acids. Contains 200x more vitamins than apples with impressive antioxidant effects that protect against environmental damage.

  • Vitamin Content: Contains 3.2x more vitamin C than lemons
  • Antioxidant: Suppresses active oxygen and provides photoprotection

Bifida Ferment FiltratePromising

Probiotic ferment derived from Bifidobacterium that strengthens skin's microbiome and natural barrier. Has anti-inflammatory properties suitable for sensitive or compromised skin.

  • Barrier Repair: Helps skin become more resistant to environmental stressors
  • Soothing: Anti-inflammatory properties calm reactive skin
Note: While Bifida is bacteria-based (not yeast), some with extreme fungal acne sensitivity may want to patch test

AdenosineProven

Anti-aging ingredient found in every living organism that stimulates collagen production, improves skin firmness, and promotes wound healing.

  • Anti-Wrinkle: Increases collagen synthesis to reduce fine lines
  • Healing: Studies show it accelerates tissue repair

Camellia Sinensis Leaf Water 6,767ppmPromising

Green tea water with antioxidant, anti-inflammatory, and antimicrobial properties. Helps soothe sensitive skin while providing additional protection against free radicals.

20 ingredients

Water, Hippophae Rhamnoides Fruit Water, Niacinamide, Propanediol, 1,2-Hexanediol, Camellia Sinensis Leaf Water, Caprylic/Capric Triglyceride, Castor Oil/IPDI Copolymer, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Tromethamine, Xanthan Gum, 3-O-Ethyl Ascorbic Acid, Adenosine, Disodium EDTA, Allantoin, Bifida Ferment Filtrate, Ethylhexylglycerin, Butylene Glycol, Melaleuca Alternifolia (Tea Tree) Leaf Extract, Caprylyl Glycol

FREE FROM: Parabens, Sulfates, Silicones, Harsh Alcohols, Artificial Fragrances, Artificial Colors, Mineral Oils, Common Allergens, Phthalates, Formaldehyde
04

Where it fits in your routine

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

Apply after toner on clean, dry skin. Use morning and/or evening. Always follow with sunscreen during the day as vitamin C increases photosensitivity.

05

How to use

HOW TO USE
1

Cleanse & Prep

Start with clean, dry skin. Apply your toner to prep and hydrate the skin for better serum absorption.

2

Apply Serum

Dispense 2-3 drops onto fingertips. Gently pat and press the serum evenly across face and neck. Avoid rubbing.

3

Allow Absorption

Wait 20-30 seconds for the serum to fully absorb before applying the next step. The lightweight formula absorbs quickly without stickiness.

4

Moisturize & Protect

Follow with your moisturizer. In the morning, always finish with SPF 30+ sunscreen. Vitamin C provides some protection but cannot replace sunscreen.

06

Who is it for?

WHO

Perfect for you if:

  • You're new to vitamin C and want a gentle introduction
  • You have sensitive skin that reacts to L-Ascorbic Acid
  • You want to brighten dull skin and fade dark spots
  • You prefer lightweight, non-sticky formulas
  • You want an affordable K-beauty vitamin C option
  • You're looking for a vegan, cruelty-free serum
  • You need a pregnancy-safe brightening product

Consider alternatives if:

  • You need maximum potency (L-Ascorbic Acid 15-20%)
  • You have severe fungal acne (contains ferment)
  • You want ferulic acid for enhanced stability
  • You prefer a CE Ferulic-type formula
  • You need intensive anti-aging treatment
07

Skin type compatibility

SKIN TYPES
Oily Skin
Excellent

Watery texture absorbs instantly without adding shine. Niacinamide helps control sebum production and minimize pores.

Dry Skin
Good

Provides light hydration but may need a richer moisturizer on top. Great for brightening without over-drying.

Combination Skin
Excellent

Lightweight formula balances well across different face zones without clogging pores or causing excess oil.

Sensitive Skin
Excellent

Specifically formulated for sensitive skin. Gentle vitamin C derivative doesn't sting or cause irritation like pure L-Ascorbic Acid.

Acne-Prone Skin
Good

Low comedogenic rating (1/5) and oil-free formula. Contains tea tree extract with antimicrobial properties. Patch test if prone to fungal acne.

08

Results timeline

WEEK 12+
Week 1-2

Hydration & Glow

Skin feels more hydrated and looks more radiant. The lightweight formula provides immediate moisture without stickiness. Some users report slight adjustment period.

85% noticed improved hydration
Week 3-4

Reduced Redness

Anti-inflammatory ingredients begin calming redness and evening out skin tone. Skin texture starts to feel smoother and more refined.

70% noticed reduced redness
Week 6-8

Visible Brightening

Dark spots begin to fade noticeably. Overall complexion appears brighter and more even. Post-acne hyperpigmentation starts improving.

75% noticed brighter skin
Week 12+

Significant Improvement

Consistent use shows significant improvement in hyperpigmentation, skin texture, and overall radiance. Best results with daily use and sun protection.

80% reported significant improvement
09

Ratings by platform

815+ REVIEWS
iHerb
4.5
Rating
500+
Reviews
Main complaint: Some users with fungal acne reported breakouts; results take time to show
Amazon
4.3
Rating
200+
Reviews
Main complaint: Small bottle size (30ml) runs out quickly with daily use
Brand Website
4.7
Rating
100+
Reviews
Main complaint: Takes 4-6 weeks to see visible brightening results
SkinSort
3.1
Rating
15
Reviews
Main complaint: Some users reported breakouts; 43% said it broke them out
10

Pros & cons

BALANCED

Praised

  • Gentle on sensitive skin - no stinging or irritation
  • Lightweight, watery texture absorbs quickly
  • No yellowing or "hot dog water" smell like pure vitamin C
  • Fragrance-free and vegan formula
  • Visible brightening and dark spot fading
  • Helps with redness reduction
  • Affordable K-beauty option
  • Layers well under makeup and other products

Criticized

  • Small bottle size (30ml) doesn't last long
  • Some users experienced breakouts
  • Results take 4-8 weeks to become visible
  • Not as potent as L-Ascorbic Acid serums
  • Contains fermented ingredient (concern for fungal acne)
  • Vitamin C concentration not disclosed
11

Budget-friendly alternatives (dupes)

DUPES
85% Match
Ascorbyl Glucoside Solution 12%
$12.90
Budget Pick

Similar stable vitamin C derivative approach. Water-based, gentle formula suitable for beginners. Lacks niacinamide and ferment ingredients. Larger 30ml bottle at lower price.

75% Match
The Vitamin C 23 Serum
$16.00
Similar

Higher vitamin C concentration (23% pure ascorbic acid) for faster results but more potential for irritation. Better for experienced vitamin C users. Korean brand like Dr. Althea.

70% Match
20% Vitamin C + E Ferulic Acid Serum
$25.00
Similar

More potent L-Ascorbic Acid formula with vitamin E and ferulic acid for enhanced stability. Better anti-aging results but may irritate sensitive skin. Popular SkinCeuticals dupe.

12

Comparison with competitors

SIDE-BY-SIDE
Ascorbyl Glucoside Solution 12%
Vitamin C Type Ascorbyl Glucoside (Stable)
Additional Actives None
Sensitive Skin Good
Fragrance None
Size 30ml

Timeless Vitamin C + E Ferulic

Vitamin C Type 20% L-Ascorbic Acid (Potent)
Additional Actives Vitamin E, Ferulic Acid, HA
Sensitive Skin May Irritate
Fragrance Slight Vitamin C Smell
Size 30ml

SkinCeuticals C E Ferulic

Vitamin C Type 15% L-Ascorbic Acid (Gold Standard)
Additional Actives Vitamin E, Ferulic Acid
Sensitive Skin Moderate
Fragrance "Hot Dog Water" Scent
Size 30ml
13

Storage & shelf life

12 MONTHS
Period After Opening (PAO)

12 months after opening. The stable vitamin C derivative extends shelf life compared to pure L-Ascorbic Acid products.

Storage

Store in a cool, dark place away from direct sunlight. Refrigeration not required but can extend potency. Keep cap tightly closed.

Packaging

Opaque dropper bottle that protects from light degradation. Drop dispenser allows precise application control.

Travel Friendly

Yes, 30ml is under the 100ml TSA liquid limit. Compact size fits easily in toiletry bags.

13

Frequently asked questions

FAQ

Yes, this serum is considered safe for use during pregnancy and breastfeeding. It does not contain any ingredients of concern such as retinoids, salicylic acid, hydroquinone, or chemical sunscreens. The vitamin C derivative (3-O-Ethyl Ascorbic Acid) and niacinamide are both pregnancy-safe brightening ingredients. However, always consult your healthcare provider before adding new products to your routine during pregnancy.

Use with caution. While the formula is largely safe, it contains Bifida Ferment Filtrate (a fermented ingredient) and Castor Oil/IPDI Copolymer. Bifida is bacteria-based (not yeast like Galactomyces), so it's generally considered safer for fungal acne. However, some individuals with severe malassezia sensitivity may want to patch test first. The majority of the formula is fungal acne safe, being oil-free and free from common triggers like fatty acids and polysorbates.

Yes, but with precautions. This gentle vitamin C can generally be layered with other actives due to its stable, non-irritating formulation. For retinol: use vitamin C in the morning and retinol at night for best results. For AHA/BHA acids: allow the serum to fully absorb before applying acids, or alternate days if you have sensitive skin. The niacinamide in this formula actually pairs well with most actives and can help buffer potential irritation.

This serum is especially well-suited for sensitive skin and vitamin C beginners. The gentle 3-O-Ethyl Ascorbic Acid derivative is much less irritating than pure L-Ascorbic Acid. It works excellently for oily and combination skin due to its lightweight, non-sticky texture and niacinamide content. Dry skin types can use it too but may need a richer moisturizer on top. Those with acne-prone skin will appreciate the low comedogenic rating (1/5).

Results timeline varies by concern. Immediate hydration and glow can be noticed within 1-2 weeks. Reduced redness typically appears around weeks 3-4. Visible brightening and dark spot fading usually begins at weeks 6-8. Significant improvement in hyperpigmentation and overall skin tone requires 12+ weeks of consistent daily use. Remember to always use sunscreen during the day for optimal results, as vitamin C works synergistically with sun protection.

Apply this serum after cleansing and toning, but before heavier products like moisturizer and sunscreen. The ideal routine order is: (1) Cleanser, (2) Toner, (3) This Vitamin C Serum, (4) Any other serums (if using), (5) Moisturizer, (6) Sunscreen (AM only). You can use it both morning and evening. If using other active serums, apply them from thinnest to thickest consistency.

This serum has a low comedogenic rating of 1/5, meaning it has minimal pore-clogging potential. The water-based, oil-free formula is specifically designed to absorb quickly without leaving residue. It's free from silicones and heavy oils that typically cause congestion. Most users with acne-prone skin report no issues, though individual reactions can vary. The niacinamide content may actually help minimize pore appearance over time.

The serum has a PAO (Period After Opening) of 12 months. Thanks to the stable 3-O-Ethyl Ascorbic Acid derivative, this product won't oxidize and turn brown as quickly as pure L-Ascorbic Acid serums. Store in a cool, dark place with the cap tightly closed. If the serum changes color significantly or develops an off smell, discontinue use. The 30ml bottle typically lasts 1-2 months with daily use (2-3 drops per application).

— Skincarisma verdict
4.0 / 5 ★★★★☆

Verdict: Dr. Althea Gentle Vitamin C Serum is an excellent entry point for vitamin C beginners and those with sensitive skin who've struggled with traditional L-Ascorbic Acid serums. The stable 3-O-Ethyl Ascorbic Acid derivative delivers brightening benefits without the irritation, oxidation, or unpleasant smell common with pure vitamin C. Combined with niacinamide and soothing botanicals, it offers a well-rounded approach to achieving a more radiant, even-toned complexion. While it won't deliver the same potency as high-strength L-Ascorbic Acid serums like SkinCeuticals, its gentle nature, affordable price point, and clean K-beauty formulation make it a smart choice for daily brightening maintenance. Best for those prioritizing tolerance over maximum intensity.

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Product Overview

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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 Adenosine
brightening Brightening from 1 ingredient(s):
Niacinamide
wound Promotes Wound Healing from 3 ingredient(s):
Niacinamide Adenosine 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
1
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
65% 35%

Product ingredient list

Showing first 5 of 20 ingredients
EWG CIR Ingredient Name & Cosmetic Functions Notes
1 Unknown
Water
Solvent, Skin Conditioning
0 Unknown
Hippophae Rhamnoides Fruit Water
Solvent
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
1 Unknown
Propanediol
Solvent, Viscosity Controlling, Viscosity Decreasing Agent
1 A
1,2-Hexanediol
Solvent, Skin Conditioning
Hydrating
VIEW ALL INGREDIENTS