La Roche-Posay Mela B3 Serum – Anti-Dark Spots & Pigmentation Care (30ml)

La Roche-Posay Mela B3 Serum is an advanced depigmentation and skin-brightening treatment designed to target stubborn dark spots, post-inflammatory pigmentation, and uneven skin tone. Powered by the innovative Melasyl™ molecule and 10% Niacinamide, this lightweight serum works at multiple stages of pigmentation formation to visibly reduce discoloration while improving skin clarity and radiance.

The gentle yet effective formula helps correct existing pigmentation, prevent the appearance of new dark spots, and support a stronger, healthier skin barrier. Its fast-absorbing, non-sticky texture makes it suitable for daily use across skin types, including sensitive and acne-prone skin.

With consistent use, the skin appears brighter, smoother, and more even-toned, making this serum an essential step in routines focused on pigmentation correction, glow enhancement, and long-term skin health.

Aqua / Water / Eau, Dimethicone, Niacinamide, Glycerin, Propylene Glycol, Polysilicone-11, Silica, Bis-Peg/Ppg-16/16 Peg/Ppg-16/16 Dimethicone, Cystoseira Tamariscifolia Extract, 2-Mercaptonicotinoyl Glycine, Peg-20 Methyl Glucose Sesquistearate, Sodium Hyaluronate, Sodium Hydroxide, Sodium Thiosulfate, Carnosine, Poloxamer 338, Ammonium Polyacryloyldimethyl Taurate, Dipotassium Glycyrrhizate, Caprylic/Capric Triglyceride, Capryloyl Salicylic Acid, Caprylyl Glycol, Citric Acid, Trisodium Ethylenediamine Disuccinate, Xanthan Gum, Pentylene Glycol, Octyldodecanol, Retinyl Palmitate, Tocopherol, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate, Phenoxyethanol, Ci 17200 / Red 33, Parfum / Fragrance, Key Ingredients: Melasyl™, Niacinamide

FAQs

Q1. What is Melasyl™ and how does it work differently from niacinamide and other dark spot treatments?
A1. Melasyl™ (2-Mercaptonicotinoyl Glycine) is La Roche-Posay's patented molecule that interrupts the signalling pathway between UV-damaged skin cells and melanocytes — the cells that produce pigment. Unlike niacinamide, which reduces melanin transfer after pigment is already produced, Melasyl™ works earlier in the process: it blocks the chemical triggers that initiate excess melanin production in the first place. The LRP Mela B3 Serum combines both mechanisms — Melasyl™ prevents new spot formation, while niacinamide at 10% simultaneously reduces visibility of spots already present.

Q2. What kind of pigmentation does it work best on, and what should I expect realistically?
A2. Post-inflammatory hyperpigmentation (PIH) — the flat dark marks left after acne, injury, or inflammation — responds fastest, with measurable improvement visible at 4–6 weeks. UV-triggered age spots and sun damage take 6–10 weeks of consistent twice-daily use. Melasma (hormone-triggered pigmentation) is the most challenging and slowest to respond; it requires the longest timeline and the strictest SPF compliance to show results. Expect skin tone improvements to be gradual and proportional to consistency.

Q3. Will it work for Indian skin tones prone to post-acne marks?
A3. Yes — PIH is one of the most common skin concerns in Fitzpatrick types III–V (the majority of Indian skin tones), because darker skin produces more melanin in response to inflammation. The Melasyl™-plus-niacinamide combination is particularly well-suited to this type of pigmentation. Daily SPF use alongside it is non-negotiable — UV exposure actively stimulates the exact signalling pathway Melasyl™ is working to suppress.

Q4. Can it be layered with retinol or vitamin C?
A4. Yes — it works well alongside both. Vitamin C and niacinamide can be used together in the same routine (contrary to older advice, this combination does not cause issues at normal use concentrations). With retinol, apply the Mela B3 Serum first, allow it to absorb, then apply your retinol. Introduce any new actives gradually and observe for tolerance before combining.

Q5. Is it safe for sensitive skin?
A5. It's dermatologically tested on sensitive skin. Niacinamide is one of the most broadly tolerated actives available. The formula does contain a small amount of parfum (fragrance) in the ingredient list — those with fragrance sensitivity should patch-test on the inner arm for 48 hours before full facial application.

Q6. How essential is daily SPF alongside this serum?
A6. It's the most important companion step in this routine. UV exposure — even on overcast days — actively stimulates melanocyte activity. If you're applying a dark-spot serum without daily SPF, the sun is counteracting the serum's work in real time. For optimum results, use Anthelios UVMUNE 400 Anti-Dark Spot SPF 50+ PA++++ as your morning final step — its Melasyl™ content extends the treatment through the entire day.

Country of Origin: France
Mfg/Marketer details: La Roche-Posay Laboratoire Dermatologique, Avenue Rene Levayer, La Roche-Posay, 86270, France
Importer details: L'Oreal India Pvt. Ltd., A-Wing, 8th Floor, Marathon Futurex Bldg, N. M. Joshi Marg, Lower Parel, Mumbai - 400013, India
Shelf Life: 36 months from manufacturing date
Storage: Store in a cool, dry place away from direct sunlight
Safety Information: For external use only. Avoid contact with eyes. Discontinue use if irritation occurs. Keep out of reach of children.