Niacinamide Vitamin C Brightening Mask
Niacinamide Vitamin C Brightening Mask
Product Description
Product overview
Mary & May Niacinamide Vitamin C Brightening Mask is a daily-use Korean sheet mask designed for concentrated brightening care. Each pack contains 30 individually saturated cotton sheets in a refillable box, formulated with 2% Niacinamide and 1,000ppm Sodium Ascorbyl Phosphate (a stable Vitamin C derivative) plus six molecular weights of Hyaluronic Acid to fade dullness, even tone, and deeply hydrate sensitive skin.
Brightens Dull Skin
2% Niacinamide blocks melanin transfer to gradually fade dark spots, post-acne marks, and uneven tone.
Texture & feel
SENSORYBrightens Dull Skin
2% Niacinamide blocks melanin transfer to gradually fade dark spots, post-acne marks, and uneven tone.
Stable Vitamin C Boost
Sodium Ascorbyl Phosphate (SAP) at 1,000ppm — a non-irritating, stable form of Vitamin C that won't oxidize.
6-Layer Hydration
Six molecular weights of Hyaluronic Acid penetrate every layer of skin for plump, bouncy moisture.
Sensitive-Skin Approved
Hypoallergenic tested, EWG green grade ingredients (excluding fragrance), and dermatologist-friendly.
Daily-Use Designed
30-sheet large case format engineered for one-a-day use without overloading the skin barrier.
Eco-Conscious Pack
Single bulk container with soybean-oil-printed packaging reduces plastic waste vs. individually wrapped masks.
Safety & compatibility
SAFEContains no retinoids, salicylic acid, hydroquinone, or chemical sunscreens. Niacinamide and Vitamin C derivatives are widely considered safe during pregnancy.
Contains Polyglyceryl-10 Laurate and Polyglyceryl-4 Laurate (laurate-based esters) which can feed Malassezia yeast. Avoid if prone to fungal acne breakouts.
No animal-derived ingredients. Brand is certified against animal testing.
The formula includes parfum. Highly fragrance-sensitive or reactive skin types should patch test before daily use.
Compatible with most actives. Niacinamide pairs safely with retinol, AHA, BHA, peptides, and other forms of Vitamin C.
SAP and Niacinamide do not increase sun sensitivity, making this mask safe for daytime use. SPF still recommended afterward.
Ingredient breakdown
INGREDIENTSWater (Aqua) ~50–60%Base
The primary solvent and largest component of the essence, dissolving water-soluble actives like Niacinamide and SAP for even delivery to the skin.
- Function: Carrier for active ingredients, hydration support.
- Safety: Non-comedogenic, non-irritating, EWG green grade.
Glycerin ~5–10%Proven
A powerhouse humectant that draws water from the deeper dermis and the air into the upper skin layers, supporting plumpness and the skin barrier.
- Mechanism: Acts as a natural moisturizing factor (NMF) component, attracting up to its own weight in water.
- Clinical: Improves stratum corneum hydration and elasticity in studies dating back decades.
Niacinamide (Vitamin B3) 2%Proven
The hero brightening active. Niacinamide blocks the transfer of melanin from melanocytes to keratinocytes, gradually fading hyperpigmentation and post-acne marks while strengthening the skin barrier.
- Brightening: Studies show 2–5% reduces hyperpigmentation visibly within 4–8 weeks.
- Barrier: Boosts ceramide synthesis, improving moisture retention.
- Sebum control: Demonstrated to reduce excess oil production in oily skin.
- Anti-inflammatory: Helpful for acne, rosacea, and atopic dermatitis.
Sodium Ascorbyl Phosphate (SAP) 1,000ppm (0.1%)Promising
A water-stable Vitamin C derivative that resists oxidation far better than pure L-ascorbic acid. SAP is gentler, won't sting, and remains effective in this water-based formula throughout the product's shelf life.
- Brightening: Trade publication in-vivo data shows SAP can fade brown spots over time.
- Acne support: A 2009 double-blind study found 5% SAP reduced inflammatory acne lesions by ~48% in 8 weeks; lower concentrations still show antimicrobial activity against P. acnes.
- Stability: Stable up to pH 7, meaning it stays active in the formula longer.
- Penetration note: Skin penetration of SAP is limited compared to pure ascorbic acid, but works well for daily maintenance brightening.
Sodium Hyaluronate (Hyaluronic Acid) TraceProven
The salt form of hyaluronic acid, known to hold up to 1,000 times its weight in water. Mary & May states the formula uses six different molecular weights for multi-depth hydration, plumping the skin from surface to deeper layers.
- Function: Humectant; binds water in skin for plumping effect.
- Multi-MW benefit: Smaller molecules penetrate deeper while larger ones smooth and hydrate the surface.
- Pairing: Synergistic with Glycerin in this formula for layered hydration.
Allantoin ~0.1–0.5%Proven
A gentle skin-conditioning agent derived from comfrey root. Soothes irritation, supports skin healing, and helps reduce redness, making it a smart inclusion for sensitive-skin users.
- Soothing: Reduces visible redness and post-active irritation.
- Healing: Promotes cell turnover and supports barrier repair.
- Tolerance: EWG green-grade, suitable for compromised skin.
Arginine TracePromising
An amino acid that acts as a pH adjuster (neutralizing the carbomer thickener) and an antioxidant. Helps maintain a skin-friendly pH and supports the skin's natural NMF.
- pH balance: Brings the formula close to skin's natural pH (~5.5).
- Antioxidant: Mild defense against environmental free radicals.
19 ingredients
Water, Glycerin, Niacinamide (2%), Dipropylene Glycol, Hydroxyacetophenone, Arginine, Carbomer, Sodium Ascorbyl Phosphate (1,000ppm), Polyglyceryl-10 Laurate, Polyglyceryl-4 Laurate, Allantoin, Hydroxyethylcellulose, Caprylyl/Capryl Glucoside, Butylene Glycol, Caprylyl Glycol, Disodium EDTA, Parfum, 1,2-Hexanediol, Sodium Hyaluronate.
Where it fits in your routine
ROUTINEUse after toner and before serum/moisturizer. Suitable for AM or PM. Daily use is approved by the brand thanks to the gentle, low-active formulation.
How to use
HOW TO USECleanse & Tone
Wash your face thoroughly and prep with your favorite hydrating toner so the mask essence absorbs efficiently.
Open the Container
Lift the lid, then open the inner protective cap. Use the included tweezer to remove one sheet — close both lids immediately to prevent the rest from drying out.
Unfold & Apply
Smooth the sheet over clean skin, aligning the eye, nose, and mouth cutouts. Press gently around the contours of your face for full contact.
Relax 10–20 Minutes
Leave on for 10–20 minutes. Avoid going past 20 minutes — once the sheet starts to dry, it can pull moisture back out of your skin.
Pat & Seal
Remove the sheet and gently pat any remaining essence into the skin. Follow with serum, moisturizer, and SPF (if AM).
Close Tightly
Hear the click when sealing the protective cap — this keeps the remaining sheets fresh and saturated for daily use.
Who is it for?
WHOPerfect for you if:
- You want gentle, daily brightening without irritation
- You have dull, uneven skin tone or post-acne marks (PIE/PIH)
- You're sensitive-skinned and find pure Vitamin C too harsh
- You're pregnant or breastfeeding and need a safe brightening option
- You love the convenience of daily sheet masks at a low per-mask cost
- You're shopping for a low-active, layering-friendly mask
Consider alternatives if:
- You're prone to fungal acne (Malassezia) — laurate esters can feed yeast
- You're highly fragrance-reactive or have rosacea triggered by parfum
- You want fast, dramatic brightening — concentrations are intentionally low
- You prefer fully drenched, dripping masks (essence saturation is moderate)
- You need a treatment-strength Vitamin C (look for 10–20% LAA serums)
Skin type compatibility
SKIN TYPESNiacinamide regulates sebum, watery essence absorbs quickly, and the dewy, non-sticky finish suits oilier skin perfectly.
6 molecular weights of HA + Glycerin deliver layered hydration, but very dry skin should follow up with a richer moisturizer to lock it in.
Lightweight enough for the T-zone yet hydrating enough for cheeks. Balances tone and oil distribution beautifully.
EWG green-graded, hypoallergenic-tested with soothing Allantoin. Caveat: contains parfum, so highly fragrance-reactive skin should patch test first.
Niacinamide + SAP both have research backing for fading post-acne marks. NOT fungal-acne safe due to laurate esters.
Niacinamide supports ceramide synthesis and barrier strength; SAP offers gentle antioxidant support. Pair with peptides for stronger anti-aging effects.
Results timeline
8+ WEEKSPlumped, Dewy Glow
Skin feels soft, hydrated, and visibly more radiant within minutes of removing the sheet — the classic "fresh out of the mask" glow.
~95% noticeSmoother Texture & Even Tone
With daily use, skin feels noticeably softer. Slight evening of tone, less dullness, and improved makeup application.
~70% noticeBrighter Complexion
Niacinamide and SAP begin to show visible brightening — overall complexion appears clearer, with reduced redness and early fading of post-acne marks.
~55% noticeFaded Spots & Stronger Barrier
Dark spots, PIH, and uneven tone visibly soften. Skin feels more resilient with stronger barrier function thanks to consistent Niacinamide use.
~45% noticeMaintained Radiance
Long-term users report consistently brighter, healthier-looking skin and consider this a "staple" repurchase item for daily glow maintenance.
~40% noticeRatings by platform
9K+ REVIEWSPros & cons
BALANCEDPraised
- Excellent value — 30 sheets for the price of ~6 individual masks
- Eco-friendly bulk packaging reduces single-use plastic
- Lightweight, fast-absorbing essence — no sticky residue
- Stable Vitamin C derivative (SAP) won't oxidize like LAA
- EWG green grade ingredients (excluding fragrance)
- Hypoallergenic tested — works well for most sensitive skin
- Pregnancy and breastfeeding safe
- Layers beautifully with serums, retinol, and other actives
Criticized
- Contains parfum — not ideal for fragrance-reactive skin
- Not fungal-acne safe (laurate esters can feed Malassezia)
- Some users find essence saturation lighter than expected
- Brightening effects are subtle, not dramatic
- Vitamin C concentration (0.1% SAP) is on the low end
- Sheet may feel large on petite face shapes
Budget-friendly alternatives (dupes)
DUPESSingle-pack format with Vitamin C derivatives and Niacinamide focused on brightening dull skin. More expensive per sheet but easier to try before committing.
Different active focus (Heartleaf), but same daily-use sensitive-skin philosophy with EWG-friendly grade. Premium bicellulose sheet feels more luxe.
Vitamin-focused brightening daily mask sold individually. Cheaper per sheet than buying singly elsewhere, but less convenient than the Mary & May 30-sheet bulk.
Higher-concentration brightening formula with glutathione and Niacinamide. Stronger results but pricier per sheet and not designed for daily use.
Comparison with competitors
SIDE-BY-SIDEStorage & shelf life
12 MONTHS12 months after opening. Use 1 sheet per day to easily finish within a month.
Store in a cool, dry place away from direct sunlight. Optional: refrigerate for an extra cooling, depuffing effect.
Sealed plastic case with double-lid (outer flip lid + inner protective cap with click-seal) and an included tweezer for hygienic use.
Bulk case is large for carry-on. Tip: pop a few sheets into a small zip bag for travel.
Frequently asked questions
FAQYes. The formula contains no retinoids, salicylic acid, hydroquinone, or chemical sunscreen filters — the typical "avoid" ingredients during pregnancy. Niacinamide is widely considered safe and is often recommended for melasma and pregnancy-related hyperpigmentation. Sodium Ascorbyl Phosphate is a mild Vitamin C derivative also generally regarded as safe. The only consideration is the parfum — if you're avoiding all fragranced products during pregnancy as a personal preference, this won't suit you. Always consult your OB-GYN if uncertain.
No. The formula contains Polyglyceryl-10 Laurate and Polyglyceryl-4 Laurate, both of which are laurate-based esters that can feed Malassezia yeast — the organism behind fungal acne. If you have a confirmed fungal acne diagnosis or notice small uniform itchy bumps after using leave-on products with similar fatty acids, this is not the mask for you. A fragrance-free fungal-acne-safe alternative would be a better fit.
Yes — Niacinamide is one of the most layering-friendly actives in skincare and pairs well with virtually everything. You can use this mask before your retinol step at night, or before a Vitamin C serum in the morning (the SAP in this mask is gentle and won't conflict). With AHA/BHA, apply your acid first, wait until the skin returns to neutral pH (~20 minutes), then apply the mask. Avoid using the mask immediately after a strong chemical exfoliant if your skin feels stinging.
It's best for oily, combination, and normal skin with concerns around dullness, uneven tone, or post-acne marks. Sensitive skin can use it well thanks to the EWG green-grade base and Allantoin, but those highly reactive to fragrance should patch test first. Dry skin will benefit too but should follow up with a richer moisturizer. Avoid if you're prone to fungal acne. Mature skin can use it as a daily brightener, ideally paired with peptides or retinol elsewhere in the routine.
Immediate results (plumped, dewy, glowy skin) are visible after the very first use. For brightening and hyperpigmentation fading, expect 4–8 weeks of consistent daily use to see meaningful change — Niacinamide and SAP work gradually rather than dramatically. The 30-sheet pack is designed to align perfectly with this timeline: one container = roughly one full skin cycle.
Use it after cleansing and toning, but before serum and moisturizer. Most users apply it 3rd or 4th in their morning or evening routine: cleanser → toner → sheet mask → (serum) → moisturizer → SPF (AM only). Leave on for 10–20 minutes, then pat any remaining essence in instead of rinsing.
No, the formula has a comedogenic rating of approximately 1/5. The base is water and humectants (Glycerin, HA), not heavy oils or butters. None of the active ingredients are pore-clogging. The only caveat is fungal acne, which is a different mechanism than traditional comedogenic acne — see the fungal acne FAQ above.
The Period After Opening (PAO) is 12 months. Since the pack contains 30 sheets meant for daily use, you'll typically finish within a single month — well within the safe window. Always close the inner protective cap firmly (listen for the click) after each use to prevent the remaining sheets from drying out. If sheets feel dry when you remove them, the seal wasn't tight.
Verdict: The Mary & May Niacinamide Vitamin C Brightening Mask is one of the best-value daily sheet masks in K-beauty. The combination of 2% Niacinamide, stable 1,000ppm Sodium Ascorbyl Phosphate, and 6-molecular-weight Hyaluronic Acid delivers genuine — if gradual — brightening and barrier-strengthening benefits, with EWG green-grade ingredients and excellent tolerance for most skin types. The 30-sheet eco-conscious pack offers unbeatable cost-per-mask economics and aligns naturally with a one-month consistency cycle. Drawbacks are limited to the inclusion of parfum (a no-go for highly fragrance-reactive users) and the laurate esters that disqualify it for fungal-acne sufferers. For everyone else seeking a gentle, daily, layering-friendly brightening boost — this is a smart, sensible buy.
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
|
|
|
| 2 |
Glycerin
Solvent, Perfuming, Fragrance, Humectant, Viscosity Decreasing Agent, Hair Conditioning, Skin Protecting, Denaturant, Skin Conditioning
|
Promotes Wound Healing
Hydrating
|
|
| 1 |
Niacinamide
Skin Conditioning, Hair Conditioning, Smoothing
|
Promotes Wound Healing
Redness
Irritation
Dark Spots
Pores
|
|
| 1 |
Dipropylene Glycol
Fragrance, Solvent, Viscosity Decreasing Agent, Masking, Viscosity Controlling
|
|
|
| 0 |
Hydroxyacetophenone
|
Irritation
|





