TXA Niacinamide 15% Serum
TXA Niacinamide 15% Serum
Product Description
Product overview
A high-potency brightening serum combining 10% Niacinamide, 5% Tranexamic Acid, and 2% Arbutin to target dark spots, acne scars, and uneven skin tone while delivering 72-hour hydration with a 10-layer hyaluronic acid complex.
Triple Brightening Complex
5% TXA + 10% Niacinamide + 2% Arbutin work synergistically to fade dark spots, acne scars, and hyperpigmentation for visibly brighter skin.
Texture & feel
SENSORYTriple Brightening Complex
5% TXA + 10% Niacinamide + 2% Arbutin work synergistically to fade dark spots, acne scars, and hyperpigmentation for visibly brighter skin.
10-Layer Hyaluronic Acid
Multi-molecular weight hyaluronic acid complex provides deep, long-lasting hydration at multiple skin layers for plump, bouncy skin.
Peptide-Enriched Formula
Contains 3 anti-aging peptides (Acetyl Tetrapeptide-5, Hexapeptide-9, Palmitoyl Tripeptide-5) for firming and skin renewal benefits.
Soothing Coral Moss Extract
Corallina Officinalis Extract combined with Panthenol calms and soothes skin while strengthening the skin barrier.
Safety & compatibility
SAFETopical tranexamic acid is generally considered safe (Category B), but limited studies exist. Consult your healthcare provider before use during pregnancy.
TXA passes into breast milk in small amounts. Recent studies show no adverse effects, but consult your doctor for personalized advice.
Contains Rosa Centifolia Flower Oil which may feed Malassezia. Niacinamide and TXA are fungal acne safe, but use with caution if prone to fungal acne.
Low irritation tested and fragrance-free. Contains soothing Panthenol and Coral Moss Extract. Patch test recommended for very reactive skin.
Can be used with retinol. Apply this serum first, wait 5-10 minutes, then apply retinol. Start with alternate nights if new to combining.
Safe to layer with vitamin C. Apply vitamin C first (lower pH), wait 1-2 minutes, then apply this serum for enhanced brightening effects.
Ingredient breakdown
INGREDIENTSNiacinamide 10%Proven
Also known as Vitamin B3, niacinamide is a multitasking powerhouse that brightens skin, minimizes pores, regulates sebum production, and strengthens the skin barrier.
- Study: 5% niacinamide significantly reduces hyperpigmentation and improves skin tone after 4 weeks (J Cosmet Dermatol, 2020)
- Benefit: Increases ceramide and fatty acid synthesis in skin barrier
- Synergy: Works synergistically with TXA to enhance brightening effects
Tranexamic Acid (TXA) 5%Proven
A synthetic amino acid derivative that inhibits melanin production by blocking the interaction between melanocytes and keratinocytes. Highly effective for melasma and stubborn hyperpigmentation.
- Study: Topical 2% TXA showed significant improvement in melasma after 12 weeks (JAAD, 2018)
- Mechanism: Inhibits plasmin activity, reducing UV-induced pigmentation pathways
- Advantage: Effective alternative for those who cannot tolerate hydroquinone
Arbutin 2%Proven
A natural derivative of hydroquinone found in bearberry plants. Gently inhibits tyrosinase enzyme to reduce melanin production without the irritation of hydroquinone.
- Study: Alpha-arbutin at 1% showed significant lightening effect comparable to 4% hydroquinone (J Cosmet Sci, 2009)
- Safety: Considered a safer alternative to hydroquinone with minimal irritation risk
- Synergy: Enhanced efficacy when combined with niacinamide
10-Layer Hyaluronic Acid Complex Multi-weightProven
A sophisticated blend of 10 different forms of hyaluronic acid including Sodium Hyaluronate, Hydrolyzed HA, and Crosspolymer variants that hydrate at multiple skin depths.
- High MW: Forms a protective film on skin surface for immediate hydration
- Low MW: Penetrates deeper for long-lasting moisture retention
- Result: 18.1% improvement in hydration after 72 hours (Clinical trial)
Ferulic Acid + Glutathione SupportingPromising
Powerful antioxidant duo that protects skin from free radical damage while providing additional brightening benefits. Glutathione is known as the "master antioxidant."
- Ferulic Acid: Stabilizes and enhances efficacy of other antioxidants
- Glutathione: Inhibits melanin synthesis and promotes lighter skin tone
- Synergy: Together they provide comprehensive protection against oxidative stress
39 ingredients
Water, Niacinamide, Glycerin, Butylene Glycol, Tranexamic Acid, Arbutin, Diethoxyethyl Succinate, Chlorphenesin, C12-14 Alketh-12, Ethylhexylglycerin, Xanthan Gum, Carbomer, Adenosine, Disodium EDTA, Melia Azadirachta Leaf Extract, Melia Azadirachta Flower Extract, 1,2-Hexanediol, Panthenol, Cyanocobalamin, Betaine, Coccinia Indica Fruit Extract, Rosa Centifolia Flower Oil, Ferulic Acid, Corallina Officinalis Extract, Pentylene Glycol, Glutathione, Hydrolyzed Hyaluronic Acid, Hydrolyzed Sodium Hyaluronate, Dimethylsilanol Hyaluronate, Hyaluronic Acid, Potassium Hyaluronate, Sodium Hyaluronate, Hydroxypropyltrimonium Hyaluronate, Sodium Hyaluronate Crosspolymer, Sodium Hyaluronate Dimethylsilanol, Sodium Acetylated Hyaluronate, Acetyl Tetrapeptide-5, Hexapeptide-9, Palmitoyl Tripeptide-5
Where it fits in your routine
ROUTINEApply after toner on clean, dry skin. Wait 1-2 minutes before layering other products. Use AM and/or PM. Always follow with SPF in the morning.
How to use
HOW TO USECleanse and Tone
Start with clean, freshly toned skin. Pat your toner in until skin is slightly damp but not wet.
Dispense 2-3 Drops
Use the dropper to apply 2-3 drops onto your fingertips. A little goes a long way with this concentrated formula.
Apply and Pat
Gently pat and press the serum onto face and neck, focusing on areas with dark spots or uneven tone. Avoid rubbing.
Wait and Layer
Allow 1-2 minutes for full absorption before applying moisturizer. Follow with SPF 30+ in the morning.
Who is it for?
WHOPerfect for you if:
- You have dark spots, melasma, or post-acne hyperpigmentation
- You want a gentle alternative to hydroquinone
- You have dull, uneven skin tone lacking radiance
- You want multi-tasking brightening + hydration
- You prefer fragrance-free, low-irritation formulas
- You're looking for glass skin glow effect
- You have normal, oily, or combination skin
Consider alternatives if:
- You have active fungal acne (contains trace rose oil)
- You're pregnant or breastfeeding without doctor approval
- You need heavy moisturization (pair with rich cream)
- You're allergic to any listed ingredients
- You expect overnight results (takes 4-8 weeks)
- You want a matte finish (this gives dewy glow)
Skin type compatibility
SKIN TYPESLightweight, watery formula absorbs instantly without adding shine. Niacinamide helps regulate sebum production for balanced skin.
10-layer hyaluronic acid provides excellent hydration, but pair with a richer moisturizer for best results on dry skin.
Perfectly balances hydration across different zones. Controls oil in T-zone while hydrating drier areas without heaviness.
Low irritation tested and fragrance-free with soothing Panthenol. Start with every other day use and patch test first.
Non-comedogenic rating of 1. Niacinamide helps prevent breakouts while TXA fades post-acne marks effectively.
Results timeline
WEEK 8-12Instant Hydration & Glow
Skin feels immediately hydrated with a noticeable dewy, glass skin finish. The lightweight texture absorbs quickly without stickiness.
15.6% radiance boost after first useEnhanced Clarity & Moisture
Clinically proven improvement in skin clarity and hydration levels. Skin appears more balanced and refreshed.
18.1% hydration improvementImproved Texture
Skin texture starts to feel smoother. Pores may appear more refined. Some users notice reduced redness.
7.5% texture improvement after 1 weekVisible Brightening
Dark spots begin to fade noticeably. Skin tone appears more even. Post-acne marks show improvement.
75% noticed brighter skin toneMaximum Results
Optimal brightening effects achieved with consistent use. Stubborn hyperpigmentation significantly faded. Overall complexion transformed.
85% reported significant improvementRatings by platform
2K+ REVIEWSPros & cons
BALANCEDPraised
- Effective triple-action brightening formula
- Lightweight, non-sticky texture that layers well
- Fragrance-free and gentle on sensitive skin
- Visible glass skin glow after first use
- 10-layer hyaluronic acid provides deep hydration
- Clinically tested with proven results
- Works well under makeup
- Contains beneficial peptides for anti-aging
Criticized
- Small bottle size (30ml) may not last long
- Results take 4-8 weeks to become visible
- Pink color may fade with light exposure
- White residue can form around dropper
- May not be suitable for fungal acne prone skin
- Price point higher than some alternatives
Budget-friendly alternatives (dupes)
DUPESSame niacinamide concentration but no TXA or arbutin. Best for oil control and pore minimizing. May be drying for some skin types. No hyaluronic acid.
Very similar formula with 10% niacinamide and 4% TXA (1% less). More hydrating texture with ceramides and oils. Better for dry skin but less suitable for fungal acne.
Same TXA concentration but half the niacinamide. Simpler formula with fewer hydrating ingredients. Good entry point for TXA beginners.
Contains tranexamic acid and niacinamide at lower concentrations. Also includes alpha arbutin. Gentler formula, may take longer to see results.
Comparison with competitors
SIDE-BY-SIDEPaula's Choice Discoloration Repair Serum
Storage & shelf life
12 MONTHS12 months after opening. Mark the opening date on the bottle for reference.
Store in a cool, dry place away from direct sunlight. Close dropper tightly after each use to prevent oxidation.
Glass bottle with dropper. The pink color from Vitamin B12 may fade with light exposure but doesn't affect efficacy.
Yes, 30ml is under TSA limit (100ml). Pack in original box to protect from light and breakage.
Frequently asked questions
FAQTopical tranexamic acid is generally considered Category B (likely safe) during pregnancy as it has minimal systemic absorption. However, oral TXA is not recommended during pregnancy. For breastfeeding, TXA passes into breast milk in very small amounts, but recent studies found no adverse effects in infants. Niacinamide and arbutin are considered safe during pregnancy and breastfeeding. As with any skincare product, we recommend consulting your healthcare provider before use during pregnancy or while breastfeeding.
This serum is mostly fungal acne safe, but use with caution. Niacinamide and tranexamic acid do not feed Malassezia yeast. However, the formula contains a trace amount of Rosa Centifolia Flower Oil, which contains fatty acids that could potentially feed the yeast. If you're prone to fungal acne, patch test first or consider alternatives like The Ordinary Niacinamide 10% + Zinc 1% which is fully fungal acne safe.
With Retinol: Yes, they work well together. Apply this serum first, wait 5-10 minutes, then apply retinol. If new to combining, start with alternate nights.
With Vitamin C: Yes, safe to layer. Apply vitamin C first (lower pH), wait 1-2 minutes, then this serum for enhanced brightening.
With AHA/BHA: Yes, but don't overdo it. Either use AHA/BHA in AM and this serum in PM, or apply AHA/BHA first, wait until absorbed, then apply this serum. Monitor for irritation.
This serum works excellently for oily, combination, and acne-prone skin types thanks to its lightweight, watery texture and niacinamide's oil-regulating properties. It's also good for normal and dry skin when paired with a moisturizer. Sensitive skin can use it due to the fragrance-free, low-irritation formula, but should patch test first. Best suited for anyone dealing with hyperpigmentation, dark spots, melasma, acne scars, or dull skin seeking a brighter, more even complexion.
Immediately: Instant hydration and glass skin glow (15.6% radiance boost after first use).
Week 1-2: Smoother texture and refined pores (7.5% improvement).
Week 4-6: Visible fading of dark spots and more even skin tone.
Week 8-12: Maximum brightening results with consistent use. Stubborn hyperpigmentation significantly improved.
Individual results vary. Use SPF daily for best results as sun exposure can worsen hyperpigmentation.
Apply after cleansing and toning, before heavier serums, moisturizer, and SPF. The routine order is: Cleanser → Toner →This Serum → Essence/Ampoule (optional) → Moisturizer → Sunscreen (AM). Use 2-3 drops, pat gently onto face and neck, and wait 1-2 minutes before layering other products. Can be used both morning and night. Always follow with SPF 30+ in the morning.
This serum has a comedogenic rating of 1 out of 5, meaning it's very unlikely to clog pores. The formula is water-based with no heavy oils, waxes, or silicones that typically cause congestion. Niacinamide actually helps minimize pores and regulate sebum production, making this suitable for acne-prone skin. The product is free from parabens, silicones, sulfates, and mineral oil. If you're extremely acne-prone, patch test on your jawline for a week before full-face application.
The serum has a 12-month Period After Opening (PAO). Store in a cool, dry place away from direct sunlight and close the dropper tightly after each use. Note: The pink color from Vitamin B12 may fade when exposed to light over time, but this does not affect the product's effectiveness. The white powder residue that may form around the dropper opening due to high niacinamide concentration is also normal and doesn't impact quality.
Verdict: The Medicube TXA Niacinamide 15% Serum delivers an impressive triple-action brightening formula with clinical backing. The combination of 5% tranexamic acid, 10% niacinamide, and 2% arbutin effectively targets dark spots, hyperpigmentation, and uneven skin tone. The 10-layer hyaluronic acid complex ensures excellent hydration without heaviness. While the 30ml size may feel small for the price, the concentrated formula means a little goes a long way. Best for those seeking a gentle yet effective alternative to hydroquinone with the added benefit of K-beauty's signature glass skin glow. Recommended for oily, combination, and acne-prone skin types dealing with post-inflammatory hyperpigmentation.
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
|
|
|
| 1 |
Niacinamide
Skin Conditioning, Hair Conditioning, Smoothing
|
Promotes Wound Healing
Redness
Irritation
Dark Spots
Pores
|
|
| 2 |
Glycerin
Solvent, Perfuming, Fragrance, Humectant, Viscosity Decreasing Agent, Hair Conditioning, Skin Protecting, Denaturant, Skin Conditioning
|
Promotes Wound Healing
Hydrating
|
|
| 1 |
Butylene Glycol
Solvent, Skin Conditioning, Masking, Fragrance, Humectant, Viscosity Controlling, Viscositydecreasing Agent
|
Hydrating
|
|
| 0 |
Tranexamic Acid
Astringent, Skin Conditioning
|
Irritation
Dark Spots
|






