La Roche-Posay Mela B3 Serum for acne-prone skin
Niacinamide
La Roche-Posay Thermal Spring Water
Melasyl
Cystoseira Tamariscifolia Extract
Sodium Hyaluronate
High
- HighCombination Skin Fit
- HighEffectiveness
- HighSafety
A great choice for acne-prone skin; a few serums fit it even better.
This fit is calculated for the concerns frequently associated with acne-prone skin: breakouts, blackheads, and post-acne marks. For scores and recommendations based on your full skin profile, including your 12D face scan results and any goals or preferences you have, please use the Lovi app.
Page built Nov 8, 2026How the Fit score works
Lovi Assistant explains
- Highly suitable for your combination skin as niacinamide and capryloyl salicylic acid work to regulate sebum and provide moderate exfoliation, addressing your acne and blemishes effectively.
- The formulation also offers excellent brightening and evening of skin tone, further enhancing radiance for your skin.
- The safety profile is excellent, with no risks of irritation for your acne-prone skin due to the absence of prohibited or harsh ingredients.
How to apply
- Use your serum as part of your PM routine and start 3x/week before working up to daily use.
- Apply this treatment after cleansing and toner, and before your moisturizer.
- Gently press 2-3 drops of the serum into your skin and let it absorb for a minute.
- Apply the product on clean, dry skin to help manage your breakouts safely.
- Avoid the eye area and do a patch test before your first use.
People Say
★4.3Overall rating based on 4.4k+ reviewsBased on a very large amount of data, users frequently praise this serum for its lightweight, non-sticky texture and its ability to fade post-acne marks and sun spots over time. Many report brighter, more even skin tone within a few weeks. A notable portion of reviewers found the results slow or nonexistent for stubborn hyperpigmentation and complained about the strong floral fragrance.
Highlights
Good texture Mostly Mentioned
- “lightweight and absorbs quickly”
- “non-sticky and hydrating”
- “great texture, feels gentle”
- “melts into the skin”
Brightens skin Often Mentioned
- “skin looks brighter”
- “more radiant complexion”
- “even skin tone”
- “glowy and healthier”
Fades dark spots Often Mentioned
- “visibly fades appearance of stubborn marks”
- “dark spots start to fade within a few days”
- “significant reduction in dark spots”
- “acne scars are lighter”
Strong fragrance Often Mentioned
- “scent is awful”
- “smells terrible”
- “strong floral fragrance”
- “headache inducing smell”
Gentle on skin Sometimes Noted
- “didn't irritate my skin”
- “suitable for sensitive skin”
- “soothing and hydrating”
- “no redness or stinging”
Ineffective for some Sometimes Noted
- “didn't see any significant improvement”
- “dark spots have not faded”
- “no change whatsoever”
- “results seem hit or miss”
Caused irritation Rarely Noted
- “dried my skin out”
- “skin felt tight”
- “caused redness and burning”
- “gave me pimples”
High price Rarely Noted
- “price is steep”
- “expensive for the size”
- “not worth the money”
- “bottle is small”
Sources: lovi.care, ulta.com, amazon.com, laroche-posay.us, lovelyskin.com, and more
Questions and answers
What makes La Roche-Posay Mela B3 Serum a great fit for acne-prone skin?
La Roche-Posay Mela B3 Serum is a great fit because niacinamide and capryloyl salicylic acid help control oil and provide gentle exfoliation to clear blemishes. It also safely brightens skin and evens out tone without causing irritation.
Which ingredients make this serum a good fit for acne-prone skin?
Niacinamide and capryloyl salicylic acid make this serum a great fit for your acne-prone skin by helping to regulate oil and gently clear clogged pores. This combination helps address blemishes effectively while keeping your skin calm and safe from harsh irritation.
What does Niacinamide do for acne-prone skin?
Niacinamide helps acne-prone skin by reducing both inflamed and uninflamed breakouts and calming redness. It is also very helpful for keeping oily skin balanced by cutting down on excess oil production, and it is well tolerated by most people.
What does Thermal Spring Water do for acne-prone skin?
Thermal spring water helps calm acne-prone skin by reducing redness, dryness, and stinging while improving overall skin comfort. It is often used alongside standard acne care to make the routine gentler and keep the skin feeling smooth and balanced.
The Medical Journal of Malaysia, 2024Journal of Cosmetic Dermatology, 2007
Where does this serum go in a skincare routine for acne-prone skin?
This serum goes in your evening routine after cleansing and toning, right before your moisturizer. Putting it on at night helps keep things simple and safe around sun exposure, though some serums can also be used in the morning or twice a day.
Can I use this serum with retinol, and in what order?
You can use this serum with retinol by applying the treatment after your cleanser and before your moisturizer, while introducing them gradually to keep your skin calm. Using this combination helps manage breakouts and uneven skin tone safely, as the formula is unlikely to cause irritation.
How often should I use this serum?
This treatment serum is used in the evening routine, starting at once a week to see how your skin responds. People who tolerate it well and see good results may carefully use it more often.
Can this serum clog pores, cause breakouts or purging for acne-prone skin?
This serum is unlikely to clog pores or cause breakouts for your acne-prone skin because it contains niacinamide and capryloyl salicylic acid to help control oil and keep skin clear. The product has a very safe formula with a low likelihood of irritation, making it a great match for your skin.
Is this serum fragrance-free and alcohol-free?
It has no drying alcohol and contains fragrance (parfum).
What the research says
Daily treatment with a facial serum containing multiple acids reduced post-inflammatory hyperchromia lesion grade and number by 29.4% at 56 days, and decreased skin oiliness by 30.7% at 7 days in Brazilian patients with acne vulgaris.
Journal of Cosmetic Dermatology, 2021A novel composition containing salicylic acid, capryloyl salicylic acid, HEPES, glycolic acid, citric acid, and dioic acid showed similar tolerance and efficacy compared with clindamycin 1% and benzoyl peroxide 5% gel in subjects with acne vulgaris.
Journal of Drugs in Dermatology, 2013Niacinamide significantly decreased hyperpigmentation and increased skin lightness compared with vehicle alone after 4 weeks of use in women by inhibiting melanosome transfer.
The British Journal of Dermatology, 2002Topical treatment of nicotinamide, alone or in combination with other active ingredients, reduces the progression of skin aging and hyperpigmentation in clinical trials while being well tolerated.
Antioxidants, 2021Capryloyl salicylic acid peel reduced fine lines, wrinkles, and hyperpigmentation comparably to glycolic acid peel in 44 female volunteers, with no statistically significant differences between the two treatments.
Journal of Cosmetic Dermatology, 2008Topical post-laser application of human adipocyte-derived mesenchymal stem cell media combined with niacinamide significantly improved wrinkle index, melanin index, patient satisfaction, and investigator esthetic improvement scores compared to vehicle cream in patients with aging skin.
Journal of Cosmetic Dermatology, 2021Topical nicotinamide prevented solar-simulated UV-induced immunosuppression in healthy volunteers, and men experienced immunosuppression at solar-simulated UV doses three times lower than those required for women.
The Journal of Investigative Dermatology, 2008Topical 5% niacinamide applied twice daily for 12 weeks reduced fine lines and wrinkles, hyperpigmented spots, red blotchiness, and skin sallowness, and improved skin elasticity compared to vehicle control in 50 female white subjects with facial photoaging.
Dermatologic Surgery, 2005Balneotherapy with thermal water altered specific skin microbiota at genus and species levels in healthy female volunteers compared to tap water, which produced no significant microbiome changes.
Life, 2023Malaysian thermal spring water as an adjunct to standard acne therapy improved skin hydration, reduced dryness and stinging, enhanced overall tolerability, and improved the acne disability index in patients with mild to moderate acne.
The Medical Journal of Malaysia, 2024A 2% Sphingomonas xenophaga ferment extract cream applied twice daily for 4 weeks significantly decreased facial vascular disorder scores compared to vehicle in 86 Caucasian female subjects, alongside dose-dependent inhibition of pre-kallikrein activity in vitro.
International Journal of Cosmetic Science, 2025Topical application of 0.1% hyaluronic acid formulations of different molecular weights led to significant improvements in skin hydration and elasticity, with low-molecular-weight formulations also significantly reducing wrinkle depth in seventy-six female subjects compared to a vehicle control.
Journal of Drugs in Dermatology, 2011Topical application of hyaluronic acid in conjunction with free gingival graft significantly reduced donor site postoperative pain until day 7 compared to normal saline, with no significant differences in graft dimensions or patient satisfaction.
Clinical Oral Investigations, 2022Treatment with a hyaluronic acid-containing mouth rinse or topical gel led to significant lesion reduction, pain relief, and normalization of lesion color in adult patients with minor recurrent aphthous stomatitis, with the gel formulation showing an earlier healing onset at 3 days.
BMC Oral Health, 2019
Ingredients
Water, 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
Behind this fit score
Lovi calculates every fit score from the full ingredient list with brand-independent rules our dermatologists and cosmetic chemists build and review, and personalizes every pick with AI trained on the real results of millions of users. Lovi trains its fit score models on a proprietary dataset built from more than 10,000 expert-labeled products and more than 100,000 simulated examples, following an internally consistent methodology presented at Cosmoprof, AMWC, and Skin of Color Update.
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Dr. Sofía Perea Pérez, MD, MSc
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Specialist dermatologist, MBBS, MD, IFAAD
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Elina Nazarenko, MD
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Victoria Derkova, MS
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