C+C Serum
C+C Serum
Product Description
Product overview
A powerful antioxidant serum featuring 15% vitamin C (10% L-ascorbic acid + 5% ascorbyl tetraisopalmitate) plus CoQ10 in a unique water-free silicone base that evaporates, leaving only the active ingredients on your skin. Designed to brighten, smooth, and firm while remaining stable for up to a year.
Dual Vitamin C System
Combines 10% L-ascorbic acid with 5% ascorbyl tetraisopalmitate for both water and oil-soluble vitamin C benefits.
Texture & feel
SENSORYDual Vitamin C System
Combines 10% L-ascorbic acid with 5% ascorbyl tetraisopalmitate for both water and oil-soluble vitamin C benefits.
Superior Stability
Water-free silicone base protects vitamin C from oxidation, staying effective for up to 12 months.
Evaporating Base Technology
Volatile silicones evaporate completely, leaving only active ingredients on your skin without residue.
Gentle Yet Effective
Formulated at the sweet spot for efficacy without irritation, suitable even for sensitive skin types.
Safety & compatibility
SAFETopical vitamin C (L-ascorbic acid) is considered safe during pregnancy with minimal systemic absorption. Always consult your healthcare provider.
Vitamin C serums are generally considered safe while breastfeeding. The topical application has minimal systemic absorption.
Contains Ethylhexyl Hydroxystearate and Squalane which may feed Malassezia yeast. Not recommended for those with fungal acne.
Silicone-based formula with low comedogenic rating (1/5). Unlikely to clog pores for most skin types.
Can be used with niacinamide products. Wait a few minutes between applications for best results.
Can be used with retinol, but consider using at different times of day to minimize potential irritation.
Ingredient breakdown
INGREDIENTSL-Ascorbic Acid 10%Proven
The pure, most bioavailable form of vitamin C. A powerful antioxidant that brightens skin, fades hyperpigmentation, and stimulates collagen production.
- Mechanism: Neutralizes free radicals, inhibits tyrosinase to reduce melanin production
- Research: Studies show 10-20% L-ascorbic acid effectively reduces photoaging signs
- Collagen: Essential cofactor for collagen synthesis enzymes
Ascorbyl Tetraisopalmitate 5%Promising
An oil-soluble vitamin C derivative that penetrates skin deeply. Provides additional antioxidant protection and brightening benefits.
- Penetration: Oil-solubility allows deeper skin penetration than water-soluble forms
- Stability: More stable than pure L-ascorbic acid, extending formula shelf life
- Conversion: Converts to active ascorbic acid within the skin
Ubiquinone (CoQ10) UndisclosedProven
Also known as Coenzyme Q10, a potent antioxidant naturally found in skin that decreases with age. Fights visible signs of aging.
- Antioxidant: Neutralizes free radicals at the cellular level
- Energy: Supports cellular energy production for healthier skin
- Anti-aging: Studies show reduced wrinkle depth with topical application
Tocopherol (Vitamin E) UndisclosedProven
A powerful antioxidant that works synergistically with vitamin C, enhancing its effectiveness and providing additional protection.
- Synergy: Regenerates vitamin C, extending its antioxidant activity
- Barrier: Strengthens skin's natural moisture barrier
- Protection: Photoprotective properties help prevent UV damage
Bisabolol UndisclosedProven
Derived from German chamomile, this soothing ingredient calms skin and reduces potential irritation from active ingredients.
- Anti-inflammatory: Reduces redness and irritation
- Soothing: Calms reactive and sensitive skin
- Healing: Promotes skin healing and recovery
13 ingredients
Cyclopentasiloxane, Isododecane, L-Ascorbic Acid, Ascorbyl Tetraisopalmitate, HDI/Trimethylol Hexyllactone Crosspolymer, Polysilicone-11, Dimethicone/Bis-Isobutyl PPG-20 Crosspolymer, Ethylhexyl Hydroxystearate, Squalane, Tocopherol, Ubiquinone, Bisabolol, Silica
Where it fits in your routine
ROUTINEApply to clean, dry skin. Wait 2-5 minutes for silicone base to evaporate before applying next product to prevent pilling.
How to use
HOW TO USECleanse & Dry
Start with clean, completely dry skin. The anhydrous formula works best on dry skin without any water or toner residue.
Apply 2-3 Pumps
Dispense 2-3 pumps onto fingertips. Gently press and pat onto face and neck, avoiding the eye area.
Wait for Evaporation
Allow 2-5 minutes for the silicone base to evaporate completely. You'll feel the texture change from silky to matte.
Continue Routine
Once fully absorbed, apply your next skincare steps. Follow with moisturizer and sunscreen (AM). Use once daily.
Who is it for?
WHOPerfect for you if:
- You want to brighten dull, uneven skin tone
- You're looking to fade dark spots and hyperpigmentation
- You need a stable vitamin C that won't oxidize quickly
- You have sensitive skin that reacts to traditional vitamin C serums
- You want anti-aging benefits (fine lines, firmness)
- You prefer fragrance-free, minimal formulas
- You're pregnant or breastfeeding and need a safe vitamin C
Consider alternatives if:
- You have fungal acne (Malassezia folliculitis)
- You dislike silicone textures on your skin
- You can't wait 2-5 minutes between skincare steps
- You prefer water-based, lightweight serums
- You want a combined vitamin C + ferulic acid formula
- You need a higher percentage vitamin C (20%+)
Skin type compatibility
SKIN TYPESSilicone base evaporates completely, leaving a matte finish with no added oil or shine. Non-greasy formula.
Contains squalane for some hydration, but not intensely moisturizing. Follow with a rich moisturizer for best results.
Evaporating base works well across different face zones. Won't add oil to T-zone or dry out cheeks.
Formulated to be effective without irritation. Contains bisabolol for soothing. Fragrance-free. Lower vitamin C % than many competitors.
Low comedogenic rating (1/5). Silicones are non-comedogenic. However, NOT suitable for fungal acne (Malassezia).
Results timeline
3+ MONTHSImmediate Glow
Skin appears more radiant and feels smoother. Antioxidant protection begins immediately upon application.
85% notice improved radianceVisible Brightening
More even skin tone becomes noticeable. Early signs of dark spot fading. Skin texture continues to improve.
78% see brighter, more even skinSignificant Improvement
Noticeable reduction in hyperpigmentation. Improved skin firmness. Fine lines appear softened. Full antioxidant benefits realized.
72% report reduced dark spotsLong-Term Transformation
Continued collagen support leads to firmer, more youthful-looking skin. Cumulative brightening effects. Ongoing protection from environmental damage.
68% notice improved firmnessRatings by platform
1K+ REVIEWSPros & cons
BALANCEDPraised
- Exceptional stability - stays fresh for up to 12 months
- Dual vitamin C system for enhanced benefits
- Gentle enough for sensitive skin
- No fragrance, alcohol, or essential oils
- Affordable compared to premium vitamin C serums
- Small batch, handmade in Los Angeles
- Science-backed formulation from chemist founder
- Visible brightening results within weeks
- Silicone base evaporates leaving no residue
- Works well for most skin types
Criticized
- Not fungal acne (Malassezia) safe
- Silicone texture unfamiliar to some users
- Must wait for base to evaporate to avoid pilling
- No ferulic acid in the formula
- Only available online (limited retail presence)
- Some find 30ml size runs out quickly
- May not layer well with thick toners
- Lower vitamin C concentration than some competitors
Budget-friendly alternatives (dupes)
DUPESHigher vitamin C concentration (23%) in a silicone base. Grittier texture, more potential for irritation. No CoQ10 or dual vitamin C system. Much cheaper but harsher on sensitive skin.
Also anhydrous (propanediol base, not silicone). Lower vitamin C at 8%. Adds alpha arbutin for extra brightening. More affordable but different texture and lower potency.
Water-based (not anhydrous). Higher vitamin C at 20% with vitamin E and ferulic acid. Shorter shelf life (3 months), must refrigerate. More proven formula but less stable.
Water-based 15% L-ascorbic acid with vitamin E and ferulic acid. European brand with excellent reviews. Not anhydrous, so less stable than Stratia but includes ferulic acid.
Comparison with competitors
SIDE-BY-SIDESkinCeuticals C E Ferulic
Storage & shelf life
12 MONTHS12 months after opening. The anhydrous formula provides exceptional stability compared to water-based vitamin C serums.
Store at room temperature in a cool, dry place away from direct sunlight. No refrigeration required thanks to water-free formula.
Airless pump bottle made with 46% post-consumer recycled (PCR) plastic. Protects formula from air and light exposure.
Yes, TSA-approved size at 30ml (under 100ml/3.4oz limit). Sturdy airless pump prevents leaking.
Frequently asked questions
FAQYes. Topical vitamin C (L-ascorbic acid) is generally considered safe during pregnancy and breastfeeding. The formula contains no retinoids, salicylic acid, hydroquinone, or other ingredients typically avoided during pregnancy. The minimal systemic absorption from topical application makes it a safe choice. However, always consult your healthcare provider before adding new products during pregnancy.
No. This product is NOT safe for fungal acne. It contains Ethylhexyl Hydroxystearate and Squalane, which can potentially feed Malassezia yeast. If you have fungal acne or are prone to Malassezia-related conditions, consider alternatives like The Ordinary Ascorbic Acid 8% + Alpha Arbutin 2% or other fungal acne-safe vitamin C options.
Yes, with some considerations. C+C Serum can be layered with other actives, but you may want to introduce them gradually. For retinol: consider using vitamin C in the AM and retinol in the PM. For AHAs/BHAs: the silicone base creates a barrier, so apply acids after the serum has fully evaporated. For niacinamide: Stratia confirms this is compatible - just wait a few minutes between applications. The brand's own niacinamide products (Rewind, Liquid Gold) work well with C+C.
C+C Serum works excellently for most skin types: oily, combination, sensitive, and normal skin all respond well. The evaporating silicone base leaves a matte finish ideal for oily skin, while squalane provides light hydration for drier types. It's particularly well-suited for sensitive skin due to its gentle concentration (15% total vitamin C) and soothing bisabolol. Dry skin types may want to follow with a richer moisturizer. NOT recommended for fungal acne-prone skin.
Results timeline varies: Week 1-2: Immediate antioxidant protection and subtle glow. Week 4-6: Visible brightening and more even skin tone. Week 8-12: Noticeable reduction in dark spots and improved texture. 3+ months: Continued collagen support, firmer skin, and cumulative brightening effects. Consistency is key - use daily for best results.
Apply after cleansing and toning, but before heavier serums and moisturizers. The key is applying to clean, DRY skin - any water residue can cause issues. Wait 2-5 minutes after application for the silicone base to evaporate before applying your next products. This prevents pilling. Follow with moisturizer and always use sunscreen in the AM, as vitamin C can increase sun sensitivity.
C+C Serum has a low comedogenic rating of 1/5. The silicone base ingredients (cyclopentasiloxane, isododecane) are non-comedogenic and actually evaporate from the skin. While it contains squalane (comedogenic rating 0-1), the overall formula is unlikely to clog pores for most people. However, if you're highly acne-prone, patch test first. Note: it is NOT suitable for fungal acne due to other ingredients.
12 months after opening. This is significantly longer than most vitamin C serums (typically 3-6 months) thanks to the anhydrous (water-free) formula. Without water, the vitamin C cannot oxidize as quickly. Store at room temperature away from direct sunlight. No refrigeration needed. If the product changes color significantly (becomes orange/brown), it has oxidized and should be replaced.
Verdict: Stratia C+C Serum is an exceptionally well-formulated vitamin C serum that solves the biggest problem with L-ascorbic acid: stability. The innovative anhydrous formula delivers 15% vitamin C (dual system) plus CoQ10 antioxidants while staying fresh for up to 12 months - unheard of for pure vitamin C products. It's gentle enough for sensitive skin yet effective enough to deliver visible brightening results. The only significant drawbacks are the lack of ferulic acid (which would boost efficacy) and it's not safe for fungal acne sufferers. At $29 for a year-stable formula, it offers excellent value compared to premium options like SkinCeuticals ($182) while outperforming most budget alternatives in stability. A must-try for anyone who has struggled with oxidizing vitamin C serums.
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 |
|---|---|---|---|
| 3 |
Cyclopentasiloxane
Solvent, Skin Conditioning, Emollient, Hair Conditioning
|
|
|
| 1 |
Isododecane
Solvent, Perfuming, Emollient, Fragrance
|
|
|
| 1 |
Ascorbic Acid
Skin Conditioning, Masking, Fragrance, Antioxidant, Ph Adjuster, Buffering Agent, Buffering
|
Promotes Wound Healing
Redness
Dark Spots
Texture
Pores
|
|
| 1 |
Ascorbyl Tetraisopalmitate
Skin Conditioning, Emollient, Antioxidant
|
Redness
Dark Spots
|
|
| 1 |
HDI/Trimethylol Hexyllactone Crosspolymer
Anticaking Agent
|
|







