Intensiv Serum Vitamin C 10%
Intensiv Serum Vitamin C 10%
Product Description
Product overview
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.
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.
Texture & feel
SENSORYStable 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.
Safety & compatibility
SAFETopical vitamin C is considered safe during pregnancy and nursing. No retinoids, hydroquinone, or harmful chemicals present.
Formula is free from fermented ingredients, fatty acids, esters, and oils that feed malassezia yeast.
Oil-free, silicone-free formula with a comedogenic rating of 0. Will not clog pores or cause breakouts.
Includes Parfum with Limonene, Linalool, Geraniol, and Alpha-Isomethyl Ionone. Patch test if you have fragrance sensitivities.
Ingredient breakdown
INGREDIENTS3-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
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
Where it fits in your routine
ROUTINEBest used in AM routine before moisturizer and sunscreen. Vitamin C boosts sun protection when paired with SPF.
How to use
HOW TO USECleanse Your Face
Start with clean, dry skin. Use a gentle cleanser and pat face dry with a clean towel.
Apply 2-3 Drops
Dispense a few drops onto fingertips. A little goes a long way with this concentrated formula.
Gently Massage In
Apply to face, neck, and décolleté using gentle upward motions. Avoid the eye area.
Follow with Moisturizer
Wait 30-60 seconds for absorption, then apply your moisturizer to seal in the serum.
Always Use Sunscreen (AM)
Vitamin C increases photosensitivity. Apply SPF 30+ as the final step in your morning routine.
Who is it for?
WHOPerfect 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)
Skin type compatibility
SKIN TYPESLightweight, oil-free gel texture absorbs quickly without adding shine or greasiness. Won't clog pores.
Provides good hydration with glycerin and betaine, but may need a richer moisturizer on top for very dry skin.
Balances well across different face zones. Hydrates dry areas without overwhelming oily T-zone.
Gentler than L-ascorbic acid, but contains fragrance allergens. Patch test recommended for reactive skin.
Non-comedogenic, fungal acne safe, oil-free formula. Great for fading post-acne dark spots and PIH.
Results timeline
WEEK 12+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 hydrationEven 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 skinVisible Brightening
Noticeable improvement in skin brightness and clarity. Dark spots and hyperpigmentation start to visibly lighten.
75% noticed reduced dark spotsFull Results
Optimal brightening achieved with consistent use. Fine lines may appear softened due to collagen support and improved skin texture.
80% satisfied with overall resultsRatings by platform
750+ REVIEWSPros & cons
BALANCEDPraised
- 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
Budget-friendly alternatives (dupes)
DUPESAnother German drugstore option from dm. Uses Ascorbyl Tetraisopalmitate instead, making it oil-soluble. Creamier texture, similar price point.
Water-based vitamin C derivative serum. Higher concentration (12%) but different derivative. More widely available globally, fragrance-free.
Uses 15% Ethyl Ascorbic Acid with ferulic acid. Higher potency formula, EU-based brand. More sophisticated formulation at a slightly higher price.
Uses pure L-ascorbic acid 10% with ceramides and hyaluronic acid. More research-backed but less stable. Fragrance-free, widely available.
Comparison with competitors
SIDE-BY-SIDEStorage & shelf life
12 MONTHS12 months after opening. Ethyl Ascorbic Acid is more stable than L-ascorbic acid.
Store in a cool, dry place away from direct sunlight. Refrigeration is optional but can extend potency.
Glass dropper bottle with opaque/dark glass to protect from light degradation.
Yes, 30ml is under the 100ml liquid limit for carry-on luggage.
Frequently asked questions
FAQYes, 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.
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
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 |
|---|---|---|---|
| 1 |
Water
Solvent, Skin Conditioning
|
|
|
| 0 |
3-O-Ethyl Ascorbic Acid
Skin Conditioning
|
Redness
Texture
Pores
|
|
| 1 |
Betaine
Skin Conditioning, Humectant, Viscosity Controlling, Antistatic Agent, Hair Conditioning
|
Hydrating
Irritation
Dark Spots
|
|
| 2 |
Glycerin
Solvent, Perfuming, Fragrance, Humectant, Viscosity Decreasing Agent, Hair Conditioning, Skin Protecting, Denaturant, Skin Conditioning
|
Promotes Wound Healing
Hydrating
|
|
| 1 |
Disodium Phosphate
Masking, Fragrance, Ph Adjuster, Buffering Agent, Anticorrosive
|
|







