Skip to content

Intensiv Serum Vitamin C 10%

Intensiv Serum Vitamin C 10%

Product Description

Product overview

Made in Various INTERNATIONAL

A budget-friendly German drugstore serum featuring 10% Ethyl Ascorbic Acid, a stable vitamin C derivative that brightens skin, supports collagen production, and provides antioxidant protection without the irritation of pure ascorbic acid.

10% Ethyl Ascorbic Acid Dermatologically Tested Fungal Acne Safe Silicone-Free Paraben-Free Oil-Free Microplastic-Free Cruelty-Free
Pregnancy
Yes
Fungal Acne
Yes
Comedogenic
0/5
Size
30ml
Price
~$7
Key Active
Vit C 10%
pH Level
4.0-5.5
Brand
ISANA
Real reviews · YouTube Shorts
Why it's different

Stable Vitamin C Formula

Uses 3-O-Ethyl Ascorbic Acid, a more stable derivative that converts to pure vitamin C in the skin without oxidizing quickly.

01

Texture & feel

SENSORY
Consistency
Lightweight Gel
Scent
Light Citrus
Absorption
30-60 seconds
Finish
Natural Glow

Stable Vitamin C Formula

Uses 3-O-Ethyl Ascorbic Acid, a more stable derivative that converts to pure vitamin C in the skin without oxidizing quickly.

Brightening Power

Targets uneven skin tone, dark spots, and dullness while promoting a radiant, healthy-looking complexion.

Antioxidant Protection

Shields skin from free radicals and environmental stressors like pollution and UV damage when paired with sunscreen.

Hydrating Complex

Glycerin, Betaine, and Biosaccharide Gum-1 work together to attract and retain moisture for plump, hydrated skin.

02

Safety & compatibility

SAFE
Pregnancy & Breastfeeding Safe

Topical vitamin C is considered safe during pregnancy and nursing. No retinoids, hydroquinone, or harmful chemicals present.

Fungal Acne (Malassezia) Safe

Formula is free from fermented ingredients, fatty acids, esters, and oils that feed malassezia yeast.

Non-Comedogenic

Oil-free, silicone-free formula with a comedogenic rating of 0. Will not clog pores or cause breakouts.

Contains Fragrance Allergens

Includes Parfum with Limonene, Linalool, Geraniol, and Alpha-Isomethyl Ionone. Patch test if you have fragrance sensitivities.

03

Ingredient breakdown

INGREDIENTS

3-O-Ethyl Ascorbic Acid 10%Promising

A stable, water and oil-soluble vitamin C derivative that penetrates skin and converts to pure ascorbic acid. Provides brightening, antioxidant, and collagen-boosting benefits without the instability of L-ascorbic acid.

  • Stability: Does not oxidize as quickly as pure vitamin C, with a shelf life of 12+ months
  • Conversion: 86.4% ascorbic acid content when converted in skin
  • Optimal pH: Works best at pH 4.0-5.5, gentler than L-ascorbic acid formulas
Less researched than L-ascorbic acid, but growing evidence supports its efficacy for brightening.

Glycerin 3-5%Proven

A powerful humectant that draws moisture from the environment and deeper skin layers to hydrate the surface. Helps maintain skin barrier function and softness.

  • Function: Humectant, skin-identical ingredient
  • Safety: Comedogenic rating of 0, safe for all skin types

Betaine 4-6%Proven

A sugar beet-derived amino acid that acts as an osmolyte, helping cells maintain proper water balance. Provides gentle moisturization and can help protect skin from irritation.

  • Function: Osmoprotectant, humectant, skin soother
  • Source: Naturally derived from sugar beets

Citrus Grandis Fruit ExtractSupportive

Grapefruit extract that provides additional antioxidant benefits and helps vitalize the complexion. Rich in natural vitamin C and bioflavonoids.

  • Function: Antioxidant, brightening, astringent
  • Benefits: Helps tighten pores and even skin tone

Biosaccharide Gum-1 1-1.5%Proven

A fermentation-derived sugar that provides immediate and long-lasting hydration. Creates a moisture-locking film on skin while soothing irritation.

  • Function: Film-forming humectant, skin soother
  • Claims: Provides 8-hour hydration boost

20 ingredients

Aqua, 3-O-Ethyl Ascorbic Acid, Betaine, Glycerin, Disodium Phosphate, Caprylyl/Capryl Glucoside, Citric Acid, Citrus Grandis Fruit Extract, Biosaccharide Gum-1, Phenoxyethanol, Sclerotium Gum, Propylene Glycol, Xanthan Gum, Parfum, Ethylhexylglycerin, Limonene, Linalool, Potassium Sorbate, Geraniol, Alpha-Isomethyl Ionone

FREE FROM: Parabens, Silicones, Sulfates, Mineral Oil, Alcohol (Denat.), Microplastics, PEGs, Oils, Retinoids, Hydroquinone
04

Where it fits in your routine

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

Best used in AM routine before moisturizer and sunscreen. Vitamin C boosts sun protection when paired with SPF.

05

How to use

HOW TO USE
1

Cleanse Your Face

Start with clean, dry skin. Use a gentle cleanser and pat face dry with a clean towel.

2

Apply 2-3 Drops

Dispense a few drops onto fingertips. A little goes a long way with this concentrated formula.

3

Gently Massage In

Apply to face, neck, and décolleté using gentle upward motions. Avoid the eye area.

4

Follow with Moisturizer

Wait 30-60 seconds for absorption, then apply your moisturizer to seal in the serum.

5

Always Use Sunscreen (AM)

Vitamin C increases photosensitivity. Apply SPF 30+ as the final step in your morning routine.

06

Who is it for?

WHO

Perfect for you if:

  • You want to brighten dull, uneven skin tone
  • You're looking for an affordable vitamin C serum
  • You have sensitive skin that reacts to pure L-ascorbic acid
  • You want antioxidant protection from environmental damage
  • You need a fungal acne safe brightening product
  • You're pregnant or breastfeeding and want safe skincare
  • You prefer silicone-free, oil-free formulas

Consider alternatives if:

  • You have a known fragrance allergy or sensitivity
  • You need maximum potency (L-ascorbic acid 15-20%)
  • You want a completely fragrance-free formula
  • You need visible results in under 4 weeks
  • You have rosacea (consult dermatologist first)
07

Skin type compatibility

SKIN TYPES
Oily Skin
Excellent

Lightweight, oil-free gel texture absorbs quickly without adding shine or greasiness. Won't clog pores.

Dry Skin
Good

Provides good hydration with glycerin and betaine, but may need a richer moisturizer on top for very dry skin.

Combination Skin
Excellent

Balances well across different face zones. Hydrates dry areas without overwhelming oily T-zone.

Sensitive Skin
Moderate

Gentler than L-ascorbic acid, but contains fragrance allergens. Patch test recommended for reactive skin.

Acne-Prone Skin
Excellent

Non-comedogenic, fungal acne safe, oil-free formula. Great for fading post-acne dark spots and PIH.

08

Results timeline

WEEK 12+
Week 1-2

Initial Glow & Hydration

Skin feels more hydrated and may appear slightly more luminous. Some users report an initial adjustment period with mild tingling.

70% noticed improved hydration
Week 3-4

Even Skin Tone

Complexion starts to look more even and radiant. Dullness begins to fade. Early signs of dark spot fading may appear.

60% noticed brighter skin
Week 6-8

Visible Brightening

Noticeable improvement in skin brightness and clarity. Dark spots and hyperpigmentation start to visibly lighten.

75% noticed reduced dark spots
Week 12+

Full Results

Optimal brightening achieved with consistent use. Fine lines may appear softened due to collagen support and improved skin texture.

80% satisfied with overall results
09

Ratings by platform

750+ REVIEWS
Rossmann Germany
4.2
Rating
500+
Reviews
Main complaint: Contains fragrance which some users find too strong
Beauty Forums
4.0
Rating
200+
Reviews
Main complaint: Results take longer than pure L-ascorbic acid serums
SkinSort
4.1
Rating
17
Routines
Main complaint: Dropper bottle not ideal for preventing oxidation
German Drugstore
4.3
Rating
50+
Reviews
Main complaint: Some experienced initial purging or breakouts
10

Pros & cons

BALANCED

Praised

  • Exceptional value at under $7 for 30ml
  • Stable vitamin C that doesn't oxidize quickly
  • Lightweight, fast-absorbing texture
  • Fungal acne safe formula
  • No parabens, silicones, or oils
  • Gentler than pure L-ascorbic acid
  • Visible brightening over time
  • Dermatologically tested

Criticized

  • Contains fragrance and fragrance allergens
  • Results slower than high-potency vitamin C
  • Dropper packaging allows air exposure
  • May cause initial purging for some
  • Less research on ethyl ascorbic acid
  • Not available in all countries
11

Budget-friendly alternatives (dupes)

DUPES
85% Match
Vitamin C Serum
$5.00
Budget Pick

Another German drugstore option from dm. Uses Ascorbyl Tetraisopalmitate instead, making it oil-soluble. Creamier texture, similar price point.

80% Match
Ascorbyl Glucoside Solution 12%
$13.50
Similar

Water-based vitamin C derivative serum. Higher concentration (12%) but different derivative. More widely available globally, fragrance-free.

70% Match
C-Glow 15% Vitamin C Serum
$12.00
Similar

Uses 15% Ethyl Ascorbic Acid with ferulic acid. Higher potency formula, EU-based brand. More sophisticated formulation at a slightly higher price.

65% Match
10% Waterless Vitamin C Serum
$28.00

Uses pure L-ascorbic acid 10% with ceramides and hyaluronic acid. More research-backed but less stable. Fragrance-free, widely available.

12

Comparison with competitors

SIDE-BY-SIDE
Ascorbyl Glucoside Solution 12%
Vitamin C Type Ascorbyl Glucoside
Concentration 12%
Stability High
Fungal Acne Safe Yes
Fragrance No
Price per ml $0.45/ml
20% Vitamin C + E Ferulic Acid Serum
Vitamin C Type L-Ascorbic Acid
Concentration 20%
Stability Low (3 months)
Fungal Acne Safe Yes
Fragrance No
Price per ml $0.83/ml
Vitamin C Serum
Vitamin C Type Ascorbyl Tetraisopalmitate
Concentration Not disclosed
Stability High
Fungal Acne Safe No (contains oils)
Fragrance Yes
Price per ml $0.17/ml
13

Storage & shelf life

12 MONTHS
Period After Opening (PAO)

12 months after opening. Ethyl Ascorbic Acid is more stable than L-ascorbic acid.

Storage

Store in a cool, dry place away from direct sunlight. Refrigeration is optional but can extend potency.

Packaging

Glass dropper bottle with opaque/dark glass to protect from light degradation.

Travel Friendly

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

13

Frequently asked questions

FAQ

Yes, topical vitamin C (including Ethyl Ascorbic Acid) is considered safe during pregnancy and breastfeeding. This formula contains no retinoids, hydroquinone, salicylic acid, or other ingredients typically avoided during pregnancy. However, always consult your healthcare provider before adding new products to your routine during pregnancy.

Yes, this serum is fungal acne safe. The formula is free from oils, fatty acids, esters, fermented ingredients, and polysorbates that can feed malassezia yeast. It's an excellent brightening option for those dealing with fungal acne.

Ethyl Ascorbic Acid is gentler than L-ascorbic acid, making it easier to combine with other actives. However, we recommend alternating days when using with retinol or strong exfoliating acids (AHA/BHA) to avoid irritation. Use vitamin C in the morning and retinol at night. If you experience any irritation, reduce frequency or separate usage by several hours.

This serum works well for most skin types, especially oily, combination, and acne-prone skin due to its lightweight, oil-free formula. Dry skin types may need a richer moisturizer on top. Sensitive skin types should patch test first due to the fragrance content. It's particularly great for those who find pure L-ascorbic acid too irritating.

Initial hydration and glow may be noticed within 1-2 weeks. Significant brightening and dark spot reduction typically takes 6-8 weeks of consistent daily use. Full results, including improved skin texture and reduced hyperpigmentation, are usually seen after 12+ weeks. Ethyl Ascorbic Acid works more gradually than pure vitamin C but is also gentler on the skin.

Apply after cleansing and toning, before heavier serums, moisturizer, and sunscreen. Best used in the morning routine since vitamin C provides antioxidant protection against environmental damage and enhances sunscreen efficacy. Wait 30-60 seconds after application before applying the next product.

No, this serum has a comedogenic rating of 0 and is non-comedogenic. It's oil-free, silicone-free, and formulated without pore-clogging ingredients. It's specifically suitable for acne-prone and oily skin types who want brightening benefits without risking breakouts.

The serum has a PAO (Period After Opening) of 12 months. Ethyl Ascorbic Acid is significantly more stable than pure L-ascorbic acid, which typically only lasts 3 months. Store in a cool, dry place away from direct sunlight. If the serum turns dark orange or brown, it has oxidized and should be replaced.

— Skincarisma verdict
4.2 / 5 ★★★★☆

Verdict: ISANA Intensiv Serum Vitamin C 10% delivers exceptional value for budget-conscious skincare enthusiasts. The stable Ethyl Ascorbic Acid formula provides reliable brightening benefits without the oxidation concerns of pure vitamin C, making it ideal for those new to vitamin C or sensitive to L-ascorbic acid. While results develop more gradually than high-potency alternatives, the fungal acne-safe, oil-free formula makes it a standout choice for acne-prone skin. The main drawback is the inclusion of fragrance, which may not suit everyone. For under $7, it's an excellent entry point into vitamin C skincare from a trusted German pharmacy brand.

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.

Awesome, I Understand!

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

Awesome, I Understand!

Notable Effects & Ingredients

anti-aging Anti-Aging from 1 ingredient(s):
Citric Acid
brightening Brightening from 2 ingredient(s):
Glycerin Citric Acid
wound Promotes Wound Healing from 2 ingredient(s):
Glycerin Citric Acid
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!

Awesome, I Understand!

Ingredients Related to Skin Types

Click on icons for more information
dry-skin Dry Skin
1 1
oily-skin Oily/Acne-Prone Skin
1
sensitive-skin Sensitive Skin
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.

Awesome, I Understand!

Ingredient Safety Breakdown

EWG Health Ratings
Low risk
Medium risk
High risk
Unknown risk
45% 25% 30%

Product ingredient list

Showing first 5 of 20 ingredients
EWG CIR Ingredient Name & Cosmetic Functions Notes
1 Unknown
Water
Solvent, Skin Conditioning
0 Unknown
3-O-Ethyl Ascorbic Acid
Skin Conditioning
Redness
Texture
Pores
1 B
Betaine
Skin Conditioning, Humectant, Viscosity Controlling, Antistatic Agent, Hair Conditioning
Hydrating
Irritation
Dark Spots
2 A
Glycerin
Solvent, Perfuming, Fragrance, Humectant, Viscosity Decreasing Agent, Hair Conditioning, Skin Protecting, Denaturant, Skin Conditioning
brightening Brightening
Promotes Wound Healing
Hydrating
1 B
Disodium Phosphate
Masking, Fragrance, Ph Adjuster, Buffering Agent, Anticorrosive
VIEW ALL INGREDIENTS