Pure Vitamin C 21.5% Advanced Serum
Pure Vitamin C 21.5% Advanced Serum
Product Description
Product overview
A high-potency vitamin C serum with 21.5% pure L-Ascorbic Acid and 70% Sea Buckthorn (Vitamin Tree) Water. This K-Beauty bestseller delivers powerful brightening, fades hyperpigmentation, and boosts collagen production with only 10 clean, essential ingredients.
High-Potency Brightening
21.5% pure L-Ascorbic Acid effectively fades dark spots, acne scars, and evens skin tone faster than lower concentrations.
Texture & feel
SENSORYHigh-Potency Brightening
21.5% pure L-Ascorbic Acid effectively fades dark spots, acne scars, and evens skin tone faster than lower concentrations.
70% Sea Buckthorn Water
Vitamin Tree Water provides antioxidants, vitamins, and hydration while helping stabilize the vitamin C formula.
Minimalist Formula
Only 10 essential ingredients means fewer potential irritants and a cleaner formulation for sensitive skin.
Collagen Support
Pure vitamin C stimulates collagen production, helping reduce fine lines and improve skin firmness over time.
Safety & compatibility
SAFETopical vitamin C (L-Ascorbic Acid) is considered safe during pregnancy and breastfeeding. No retinoids, salicylic acid, or hydroquinone present.
Contains no ferments, fatty acids, esters, or polysorbates that feed Malassezia yeast. Safe for fungal acne sufferers.
Oil-free, silicone-free formula with no pore-clogging ingredients. Will not cause acne or clogged pores.
21.5% is a high concentration. Begin with 2-3x weekly use and build tolerance. May cause temporary tingling on first use.
Do not use in the same routine as chemical exfoliants or retinoids to prevent irritation. Alternate AM/PM or different days.
Vitamin C increases photosensitivity. Always apply SPF 30+ sunscreen when using this product, especially during daytime use.
Ingredient breakdown
INGREDIENTSL-Ascorbic Acid (Vitamin C) 21.5%Proven
The gold standard form of vitamin C with the most clinical research. At 21.5%, this is a high-potency concentration for maximum brightening and anti-aging benefits.
- Brightening: Inhibits tyrosinase enzyme to reduce melanin production and fade dark spots
- Collagen Boost: Essential cofactor for collagen synthesis, improving skin firmness
- Antioxidant: Neutralizes free radicals from UV exposure and pollution
- Optimal pH: Formulated at pH 2.5-3.0 for maximum absorption and efficacy
Hippophae Rhamnoides Water (Sea Buckthorn) 70%Promising
Also known as Vitamin Tree Water, this nutrient-rich botanical water forms the base of the serum and provides complementary antioxidant benefits.
- Antioxidant Rich: Contains vitamins A, C, E, and flavonoids for additional free radical protection
- Hydration: Adds moisture without oils, keeping the formula lightweight
- Skin Regeneration: Supports natural skin healing and barrier repair
Panthenol (Pro-Vitamin B5) ~3-5%Proven
A powerful humectant and skin-soothing ingredient that helps offset potential irritation from the high vitamin C concentration.
- Barrier Repair: Strengthens skin barrier function and reduces inflammation
- Hydration: Attracts and binds water for long-lasting moisture
- Wound Healing: Accelerates skin repair and reduces redness
Allantoin ~1-2%Proven
A gentle soothing agent derived from comfrey root that calms irritation and supports skin healing.
- Soothing: Reduces irritation from active ingredients
- Cell Regeneration: Promotes healthy cell turnover
- Moisturizing: Softens and conditions the skin
Sodium Hyaluronate <1%Proven
The salt form of hyaluronic acid that penetrates skin more easily and holds up to 1000x its weight in water.
- Deep Hydration: Plumps skin and reduces appearance of fine lines
- Better Absorption: Smaller molecular size than HA for improved penetration
10 ingredients
Hippophae Rhamnoides Water (70%), Ascorbic Acid (21.5%), Sodium Lactate, 1,2-Hexanediol, Sodium Hyaluronate, Panthenol, Cassia Obtusifolia Seed Extract, Allantoin, Xanthan Gum, Ethyl Hexanediol
Where it fits in your routine
ROUTINEApply to clean, dry skin after toner. Wait 10-15 minutes before layering other products for best absorption. Best used in AM routine with SPF. Can be used PM but avoid combining with retinol or AHA/BHA.
How to use
HOW TO USECleanse & Tone
Start with clean, dry skin. Apply your toner and wait for it to fully absorb before applying the vitamin C serum.
Apply 3-4 Drops
Dispense 3-4 drops onto fingertips or palm. A little goes a long way with this concentrated formula.
Pat Gently Into Skin
Apply to face, avoiding eye area and any open wounds. Pat gently until absorbed. Some tingling is normal.
Wait & Layer
Wait 10-15 minutes for full absorption before applying next skincare steps. Follow with moisturizer and always finish with SPF in the morning.
Who is it for?
WHOPerfect for you if:
- You have hyperpigmentation, dark spots, or post-acne marks (PIH)
- You want faster results and can tolerate high-potency actives
- Your skin is dull and needs brightening
- You have experience with vitamin C serums
- You need a fungal acne-safe brightening treatment
- You prefer minimal, clean ingredient formulas
- You have oily or combination skin (oil-free formula)
Consider alternatives if:
- You're a complete beginner to vitamin C (try 10-15% first)
- You have very sensitive, reactive, or compromised skin barrier
- You cannot commit to daily sunscreen use
- You need a stabilized formula with longer shelf life
- You prefer vitamin E and ferulic acid in your formula
- You want overnight results (vitamin C takes 4-12 weeks)
Skin type compatibility
SKIN TYPESLightweight, watery texture absorbs instantly without adding shine. Oil-free formula won't clog pores or contribute to excess sebum.
Panthenol and hyaluronic acid provide hydration, but dry skin types should layer with a rich moisturizer. May feel slightly drying alone.
Balances well across different face zones. Light enough for oily T-zone while providing enough hydration for drier cheeks.
High 21.5% concentration may be too potent. Start 1-2x weekly and patch test. Consider the gentler 15% version if irritation persists.
Non-comedogenic (0/5), fungal acne safe, oil-free. Helps fade post-acne marks (PIH) effectively without causing new breakouts.
Results timeline
MONTH 3+Immediate Glow & Adjustment Period
Skin may appear brighter immediately after application. Some users experience temporary tingling, slight redness, or purging as skin adjusts to the high concentration. This is normal and typically subsides.
85% noticed instant glow effectVisible Tone Improvement
Consistent users begin noticing more even skin tone, reduced redness, and early fading of superficial dark spots. Skin texture feels smoother and more refined.
70% saw improved skin toneSignificant Brightening Results
Noticeable reduction in hyperpigmentation, acne scars, and sun spots. Collagen-boosting effects begin showing with improved firmness. Full brightening benefits achieved.
80% reported significant fading of dark spotsMaintenance & Prevention
Continue use to maintain results and prevent new pigmentation. Antioxidant protection helps prevent future sun damage. Fine lines appear softened with continued collagen support.
90% would repurchase for continued useRatings by platform
8K+ REVIEWSPros & cons
BALANCEDPraised
- High-potency 21.5% pure vitamin C for fast results
- Minimal 10-ingredient formula — clean and effective
- Fungal acne safe — rare for vitamin C serums
- Lightweight, non-sticky texture absorbs quickly
- Vegan, cruelty-free, and free from harmful additives
- Affordable compared to similar high-potency serums
- Effectively fades dark spots and PIH
- 70% sea buckthorn adds antioxidant benefits
Criticized
- Oxidizes quickly — must use within 6 months
- No vitamin E or ferulic acid for enhanced stability
- Can cause tingling/stinging on sensitive skin
- Dropper packaging less hygienic than airless pump
- Small 30ml bottle requires frequent repurchasing
- Not suitable for complete vitamin C beginners
- Requires refrigeration for optimal shelf life
- Occasional reports of leaky bottles during shipping
Budget-friendly alternatives (dupes)
DUPES
Higher concentration (23%) in a silicone-free suspension. Has a gritty texture that some find challenging. More affordable but less elegant formulation. No sea buckthorn benefits.
Korean vitamin C serum with 24% concentration. Includes niacinamide for added brightening. More affordable but may not be suitable for those avoiding niacinamide with vitamin C.
Same parent company (Wishtrend). Much gentler at 5% concentration — ideal for sensitive skin or beginners. Slower results but almost no irritation potential.
Same brand, gentler 15% formula with added ferulic acid and niacinamide for enhanced stability and brightening. Better for those who found 21.5% too strong.
Comparison with competitors
SIDE-BY-SIDE
SkinCeuticals C E Ferulic
Storage & shelf life
6 MONTHS6 months after opening. L-Ascorbic Acid is unstable and oxidizes quickly. Use promptly for best results.
Store in a cool, dark place away from direct sunlight. Refrigeration recommended to slow oxidation and extend shelf life.
Dark amber glass dropper bottle to protect from light degradation. Keep in original box when not in use.
Yes, 30ml is under TSA 100ml limit. Pack carefully as glass bottle can break. Avoid leaving in hot environments.
Frequently asked questions
FAQYes, topical vitamin C (L-Ascorbic Acid) is considered safe during pregnancy and breastfeeding. It contains no retinoids, salicylic acid, hydroquinone, or other pregnancy-unsafe ingredients. However, always consult with your healthcare provider before starting new skincare products during pregnancy.
Yes, this serum is fungal acne safe. It contains no ferments, fatty acids (C11-24), esters, oils, or polysorbates that feed Malassezia yeast. This makes it one of the few high-potency vitamin C serums suitable for those with fungal acne.
It's not recommended to use vitamin C in the same routine as retinol, AHA, or BHA due to potential irritation and pH conflicts. Use vitamin C in the morning and retinol/acids in the evening, or alternate days. Wait at least 30 minutes between application if you must layer them.
This serum is excellent for oily, combination, and acne-prone skin types due to its lightweight, oil-free formula. It's also great for normal skin. Those with dry skin can use it but should layer with a rich moisturizer. Sensitive skin types may find 21.5% too strong and should consider the 15% version or build tolerance gradually.
Most users notice an immediate glow effect. Visible improvement in skin tone and texture typically appears within 4-6 weeks of consistent use. Significant fading of dark spots and hyperpigmentation usually occurs around 8-12 weeks. Continued use maintains results and provides ongoing antioxidant protection.
Apply after cleansing and toning, before heavier serums and moisturizer. The rule is thin to thick consistency. Wait 10-15 minutes after applying for full absorption before layering other products. Always finish with sunscreen in the morning as vitamin C increases photosensitivity.
No, this serum has a comedogenic rating of 0/5. It's completely oil-free, silicone-free, and contains no pore-clogging ingredients. It's specifically designed to be non-comedogenic and is safe for acne-prone skin. The light, watery texture absorbs quickly without leaving residue.
Use within 6 months of opening for optimal efficacy. L-Ascorbic Acid oxidizes when exposed to air and light. Signs of oxidation include color change from clear/light yellow to dark yellow or orange. If oxidized, the serum loses effectiveness and should be replaced. Store in the refrigerator to extend shelf life.
Verdict: By Wishtrend Pure Vitamin C 21.5% Advanced Serum is an excellent high-potency vitamin C option for those seeking fast brightening results without breaking the bank. Its standout features include the fungal acne-safe formula, minimal 10-ingredient composition, and effective 21.5% L-Ascorbic Acid concentration. While it lacks the stabilizing vitamin E and ferulic acid found in pricier options, it delivers impressive results for hyperpigmentation and dull skin. Best suited for experienced vitamin C users with oily to normal skin who can commit to proper storage and daily SPF use. Sensitive skin types should start with lower concentrations.
Product Overview
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.
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.
Quick Product Notes
Paraben-Free
Paraben-Free
Understanding Parabens
Parabens are a large group of preservatives which are used to prevent bacteria growing in cosmetic formulations. There has been some healthy controversy surrounding them due to a few studies finding paraben presence in breast tumours and breast tissue. However, the majority of the scientific community have deemed these findings non-conclusive due to the limitations of these studies. There's still a lot of support for avoiding parabens following the better safe than sorry route. If you do we completely support you! If you are concerned about the health safety of parabens, then feel free to avoid them by looking out for the Paraben-Free icon. If not, don't worry about it - they do have had one of the longest safety records as preservatives!
Which Ingredients are classified as Paraben?
A product will be paraben-free if it does not contain any of the following parabens:
- Sodium Isobutylparaben
- Sodium Ethylparaben
- Sodium Butylparaben
- Propylparaben
- Isopropylparaben
- Isobutylparaben
- Sodium Propylparaben
- Butylparaben
- Ethylparaben
- Sodium Methylparaben
- Methylparaben
Sulfate-Free
Sulfate-Free
Understanding Sulfates
Sulfates are a large group of ingredients which act as cleansing agents in Cosmetics. They help loosen up the dirt and grime from your skin and hair to allow for water to wash it away with ease. However some sulfates are so good at their job, they can wash off your skin’s own natural oils that keep it moisturised and protected which can lead to dryness and irritation. Most people will find no issues with sulfate, however if you find your skin doesn't like sulfates then free feel to avoid them by looking out for the sulfate-free icon on Skincarisma.
Which ingredients are classified as sulfates?
We've taken the Sulfates which are considered more harsh for our Sulfate-Free status. A product will be Sulfate-Free if it does not contain any of the following Sulfates:
- TEA-Dodecylbenzenesulfonate
- Ammonium Laureth Sulfate
- Sodium Lauryl Sulfate
- PEG-15 Cocamine
- Sodium Laureth Sulfate
- Sodium Cocoyl Sarcosinate
- Sodium C14-16 Olefin Sulfonate
- Dioctyl Sodium Sulfosuccinate
- Ammonium Xylenesulfonate
- Ammonium Lauryl Sulfate
- Sodium Xylenesulfonate
- Sodium Myreth Sulfate
- Sodium Lauryl Sulfoacetate
Alcohol-Free
Alcohol-Free
Understanding Simple Alcohols
Alcohol ingredients are widely used in cosmetics and come in different types. For the most part alcohols are not problematic at all. However one type of alcohols, simple alcohols can be quite drying to the skin because it evaporates very quickly. This can cause irritation which can also lead to other skin complications. These alcohols should never be used alone on your skin, but combined with other cosmetic ingredients, they are normally without issue. However, for some people with sensitive and easily irritable skin, avoiding products with these simple alcohols may be beneficial. If you find your skin doesn't like these simple alcohols, then free feel to avoid them by looking out for the Alcohol-Free icon.
Which Ingredients are classified as Alcohol?
A product will be alcohol-free if it does not contain any of the following alcohol ingredients:
- SD Alcohol
- Alcohol Denat
- Isopropyl Alcohol
- Alcohol
Silicone-Free
Silicone-Free
Understanding Silicones
If you've ever used a skincare, makeup or beauty product that's made your skin look and feel smoother tempoarily - it's likely contained Silicone. They are a popular class of ingredients found in cosmetics due to their smooth, soft, easy-to-spread and smooth properties that help creates an artificial layer/barrier on top of skin or hair (commonly found in conditioners).
For the same reasons they are popularly used, they are also commonly avoided. Anecdotally, many individuals have reported that Silicones cause/excerbate breakouts, irritation, cause a feeling of skin being unable to breathe, cause clumping of cosmetic products and find it difficult to wash off. As a result, those who find them problematic are avoiding them and increasingly, cosmetic companies are avoiding them as well.
If you have had bad experiences with Silicones in the past, or suspect they are problematic then look out for the tick on the Silicone-free label.
Disclaimer
The Silicone-free label only includes the most common Silicone ingredients that have indentified been reported by individuals that could potentially cause issues.
These include: Amodimethicone, Behenoxy Dimethicone, Bis-Aminopropyl Dimethicone, Cetearyl Methicone, Cetyl Dimethicone, Cyclomethicone, Cyclopentasiloxane, Dimethicone, Dimethicone Copolyol, Dimethiconol, Methicone, Phenyl Trimethicone, Phenyl Trimethicone, Stearoxy Dimethicone, Stearyl Dimethicone, Trimethylsilylamodimethicone.
Note, that this does not include all ingredients part of the Silicone class of ingredients.
EU Allergen-Free
EU Allergen-Free
Understanding the Identified Contact Allergens
The EU's Scientific Committee on Consumer Safety (SCCS) has identified and established 26 cosmetic ingredients that are likely contact allergens (potential to cause skin allergies) as demonstrated in clinical or epidemiological studies. The EU's SCCS have recommend cosmetic companies to disclose them on the labels if used and in cases where the concentration exceeds 0.001% in leave-on products and 0.01% in rinse-off products, then they must be labelled.
Look out for the tick on the EU-Allergen free label to know your cosmetic is free from any of the 26 identified cosmetic ingredients.
For more information regarding the EU's Scientific Committee on Consumer Safety, please visit their official website.
Disclaimer
The EU Allergen Free label is for the 26 ingredients identified by the EU SCCS and products will be only flagged if a suspected ingredient is on it's ingredient list. It is possible for cosmetics to contain one of the suspect ingredients without it appearing on the ingredient list due to it not reaching the concentration threshold to disclose it and cosmetic manufacturers choice to not disclose it.
Also note, the EU Allergen Free label is not personalized for your own allergies you may have and it does not constitute as medical advice. For your specific case, always consult your medical professiona such as dermatologist, physician, pharmacist, or health care provider - please read our medical disclaimer for more information.
Fungal Acne (Molassezia) Safe
Fungal Acne (Molassezia) Safe
Understanding Fungal Acne (Pityrosporum Folliculitis/Malassezia Folliculitis)
Pityrosporum Folliculitis/Malassezia folliculitis or simply known as Fungal Acne is a persistent acne-like condition that commonly responds poorly to traditional acne-treating methods. Unlike most cases of Acne where bacteria is the culprit, Fungi is the culprit of Fungal Acne (Hence the name!). There are certain classes & groups of ingredients that have been shown to promote and feed the growth of the Fungal Acne, Fungi such as fatty acids, oils, esters, polysorbates and fermented ingredients.
For more information regarding Fungal Acne, please visit Simple Skincare Science (f.c) - #3 of our Recommend Skincare Resources for an amazing comprehensive guide!
Please Read: How to use the Fungal Acne (Malassezia) Label
At SkinCarisma, we've done our best to identify as many ingredients as possible but note the fungal-free label may not be 100% accurate due to the complexconditions and combination of ingredients that malezzeria can thrive on.
Additionally, products that may contain ingredients that have shown to feed Malassezia may not neccessarily exacerbate the condition due to concentration of ingredient used in the product, this information is simply not available on the products.
As a result, please note this is only an experimental label that can be best used to possible identify problematic products you have used in the past. It is in no way a perfect identifier nor a predictor in whether or not it will exacerbate or cause fungal acne. It will continue to be worked on as more information and research comes to light.
If you find any ingredients you believe should be included, please email us at snails@skincarisma.com.
Disclaimer
Due to the lack of substantial research into this area it is very likely there are other ingredients and class/groups of ingredients that could feed Fungal Acne which have not been indentified.
The Fungal-Safe label does not constitute as medical advice. For your specific case, always consult your medical professiona such as dermatologist, physician, pharmacist, or health care provider - please read our medical disclaimer for more information.
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.
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
Notable Effects & Ingredients
Anti-Aging from 1 ingredient(s):
Brightening from 1 ingredient(s):
Promotes Wound Healing from 4 ingredient(s):
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.
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!
Ingredients Related to Skin Types
Dry Skin
Oily/Acne-Prone Skin
Sensitive Skin
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.
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.
Ingredient Safety Breakdown
Product ingredient list
| EWG | CIR | Ingredient Name & Cosmetic Functions | Notes |
|---|---|---|---|
| 1 |
Ascorbic Acid
Skin Conditioning, Masking, Fragrance, Antioxidant, Ph Adjuster, Buffering Agent, Buffering
|
Brightening
Anti-Aging
Promotes Wound Healing
Redness
Dark Spots
Texture
Pores
|
|
| 0 |
Hippophae Rhamnoides Water
Masking, Perfuming, Skin Conditioning
|
|
|
| 0 |
Sodium Lactate
Humectant, Buffering
|
|
|
| 1 |
1,2-Hexanediol
Solvent, Skin Conditioning
|
Hydrating
|
|
| 1 |
Sodium Hyaluronate
Skin Conditioning, Humectant
|
Promotes Wound Healing
Hydrating
|