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Serum5$12.00
Mela B3 Dark Spot Serum with Melasyl + Niacinamide
A dark-spot serum pairing La Roche-Posay's new Melasyl molecule with 10% niacinamide; promising brand data, mixed real-world results.
7.6
Good
Beauty score
#9 of 9 serums
Community
—/10
- Format
- Serum
- Size
- 1 fl oz
- Price per oz
- $44.35 / oz
- Price tier
- Mid-range
Made for: All skin types · Normal skin · Combination skin · Oily skin
Last reviewed November 2, 2026 by our editors · How we score
The verdict
A dark-spot serum pairing La Roche-Posay's new Melasyl molecule with 10% niacinamide; promising brand data, mixed real-world results.
Mela B3 Serum combines Melasyl, La Roche-Posay's multi-patented anti-discoloration ingredient developed over 18 years, with 10% niacinamide. The brand reports that 90% of subjects showed improvement in at least one measure of persistent dark spots after 8 weeks. Dermatologists have reviewed it as a possible alternative to hydroquinone and kojic acid, while creator verdicts range from visible fading to skepticism. It contains fragrance and silicones, which matters for sensitive or fragrance-averse users.
Best for
- Persistent dark spots and post-acne marks
- Hydroquinone-free routines for deeper skin tones
- People already using daily sunscreen
What we love
- Melasyl, a new multi-patented anti-discoloration ingredient, plus 10% niacinamide
- Brand study: 90% saw improvement in persistent dark spots after 8 weeks
- Tested on sensitive skin, allergy tested and non-comedogenic
- Designed for all skin tones, per La Roche-Posay
Worth knowing
- Contains fragrance and several silicones
- Results reported by creators are gradual and inconsistent
- Melasyl is new and proprietary, so most published data comes from La Roche-Posay
- Pricier than budget dark-spot serums
How it scored
The breakdown.
Five factors, weighted for formulas. Here’s our working.
7.6Good
Beauty score out of 10. Brands can’t pay for placement — ever.
- Results30%7.6
Brand data reports 90% of 73 women improved on at least one dark-spot measure at 8 weeks, but creator and dermatologist reviews describe gradual, variable fading.
- Formula & ingredients20%8.0
Pairs a new patented anti-pigment molecule with 10% niacinamide and soothing support, though Melasyl is proprietary with mostly brand-published data, and the formula includes fragrance.
- Texture & experience15%7.6
A lightweight serum used morning and evening; tested on sensitive skin and allergy tested, but scented.
- Value20%7.2
$44.99 for 30 mL is mid-priced, above budget tranexamic acid or niacinamide serums with similar goals.
- Community love15%7.4
Heavily reviewed since launch with interest from dermatologists, but YouTube titles range from enthusiastic to 'beware this viral serum.'
Beauty profile
Inside the bottle.
Texture
Lightweight serum, per La Roche-Posay
Format
Serum
Fragrance
Contains fragrance — Contains parfum/fragrance per the published ingredient list
Size
1 fl oz / 30 ml
Key ingredients
Ingredient encyclopedia →What’s in it: Melasyl (2-mercaptonicotinoyl glycine) with 10% niacinamide, plus La Roche-Posay thermal spring water, sodium hyaluronate, carnosine and a small amount of capryloyl salicylic acid (LHA). Melasyl has no hub id in our ingredient list.
How to use
Apply 3-4 drops to face and neck after cleansing, morning and evening, avoiding the eye area; in the morning finish with sunscreen such as Mela B3 UV Daily Moisturizer SPF 30.
Free from (brand-stated)
- parabens
Claims & certifications
- Non-comedogenic
- Dermatologist-tested
- Paraben-free
Full ingredient list (INCI)32 ingredients · key actives highlighted · as listed by the brand
- 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
Formulas change. Always check the packaging, and patch-test if your skin is reactive.
Creator video reviews
Watch it in action.
Real reviews, try-ons and wear tests from independent creators — verified with TikTok and YouTube and labelled when sponsored.
We don’t pay creators for reviews, and they don’t pay us. Nothing from TikTok or YouTube loads until you press play.
What people say
Straight from the source.
Verbatim from Reddit, forums, blogs and the beauty press — linked, so you can read the whole thread.
2 verbatim quotes · 1 mixed
r/HyperpigmentationMixed
I recently used the la roche posay mela b3 serum. Wow my skin mustache has faded and I’ve been using 2 weeks. My other pigmentation not so much.
r/SkincareAddictionNeutral
There’s no dupe for mela b3 since Melasyl is proprietary from LRP so that might be worth replacing if you did find it helpful for your sunspots and discoloration.
Price & value
Is it worth it?
Typical price
$44.99
for 1 fl oz / 30 ml
Per ounce
$44.35
DrugstoreMid-rangePrestigeLuxury
Roughly 2.0× the typical price per ounce for serums. Our value score: 7.2/10 for a mid-range pick.
Price checked November 2026 at a non-Amazon retailer. Prices change — retailers show the current one.
Where to buy
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Community
What members noticed.
Ratings, skin types and the benefits people actually saw — logged on the Benefit Wheel.
No member ratings yet.
Tried it? Your score — and your skin or hair type — helps the next person decide.
Highlighted: what it’s built to do.
Discussion
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Tried La Roche-Posay Mela B3 Dark Spot Serum with Melasyl + Niacinamide? Ask a question or share how it’s working for your skin or hair — you’ll be the first.
FAQ
Good questions.
Can I use Mela B3 with vitamin C?
La Roche-Posay says Mela B3 can be used morning or night but suggests vitamin C serum in the morning and Mela B3 at night if you use both.
When will I see results?
The brand cites a 73-person consumer study showing visible results from 2 weeks and says 90% showed a reduction in the look of persistent dark spots after 8 weeks. Daily sunscreen is recommended to protect results.
Is it fragrance-free?
No. The published ingredient list includes parfum/fragrance, although the brand says the formula is tested on sensitive skin and allergy tested.
How is it different from Mela B3 Double Dose?
La Roche-Posay says the serum targets dark spots, uneven tone and post-acne marks with Melasyl and niacinamide, while Double Dose combines Melasyl with Proxylane for age spots, wrinkles and firmness in a gel-cream texture.
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