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✨ Unlock your skin’s radiant future with science-backed spot correction!
La Roche-Posay Mela B3 Niacinamide Serum is a dermatologist-developed, anti-aging dark spot corrector featuring a breakthrough patented Melasyl complex and 10% Niacinamide. Clinically proven to reduce sun spots, age spots, and post-acne marks across all skin tones, this 30ml serum delivers long-lasting, radiant, and even skin with a clean, paraben-free formula.

| Asin | B0CM4B43DZ |
| Best Sellers Rank | #39 in Facial Serums |
| Item Model Number | LRMBSR30 |
| Manufacturer | Factory EU - France COSMETIQUE ACTIVE PRODUCTION |
| Product Dimensions | 1.4 x 2.17 x 4.29 inches; 1.06 ounces |
A**R
One of my favorite drugstore serums!
I am absolutely LOVING this LRP MelaB3 Niacinamide serum. I did some research and liked what I saw regarding the studies of long-term use of this product. After several months, the B3 reveals brighter skin and dark spots are less noticeable. I have several dark spots on my cheeks, and am trying everything I can to reduce them (short of a laser, and that’s not off the table)! This is a slightly viscous (not viscious! haha) pink serum that comes in a blue bottle with a dropper. I store it out of sunlight in a cool place because usually that’s why skincare items come in unusual packaging, and that’s clue enough for me. It doesn’t take much to cover my entire face, neck, and chest with the serum…maybe 3-4 drops. I do get very slightly annoyed by the wide round dropper because when I lower it back into the bottle, it almost always touches the side on the way in and some of the serum drips down the threaded glass edge of the bottle, making a mess and wasting product. Very minor, but annoying nonetheless. Now, this serum has a very particular scent. It really turned me off the first few times I used it, and I can’t put my finger on exactly what it is. But now I find myself looking forward to the scent, and I think that a testament to how luxurious this makes my skin feel and how easy it is to layer with other products. I can’t speak to effectiveness of dark spots yet, as this does purport to be a bit slower at that (I mean, dark spots are persistent and insidious as it is) so in the meantime, I’ll say that my skin is luminous and moisturized even when this is the only skincare product I use before bed or in the morning (beneath sunscreen of course, always always sunscreen). Before I forget, this layers in such a lovely way with both my sunscreen and also with a retinal product I use. No pilling! Though not instantly, it melts right into my skin, plumping it right up.
J**D
I recommend. But keep in mind it does take a little bit to make a difference.
This is my first bottle of this product so far I really like it. I am noticing a difference day by day than it makes in my skin tends to fade freckles and dark spots.
M**A
Brighter Skin and More Even Tone with La Roche-Posay
I love this La Roche-Posay serum. It has a pleasant texture, absorbs easily, and is a great addition to my skincare routine. I like that it contains 10% niacinamide to help improve the appearance of dark spots and even out skin tone. It’s a great option for anyone looking for brighter, more even-looking skin.
P**S
Great product
ve been using La Roche-Posay Mela B3 Serum consistently, and I’m really impressed. It has helped fade my post-acne marks and made my skin tone look more even. The texture is lightweight, absorbs quickly, and doesn’t feel greasy. It works well under moisturizer and sunscreen. Results take a few weeks, so patience is important, but it’s worth it. I would definitely recommend it for anyone dealing with dark spots or uneven skin tone.
A**R
Very fine serum…
Been concentrating on one age spot. While applying twice each day, no noticeable difference. The serum is fine for the rest of my face. No irritation and lightweight. Skin looks smooth and enhanced.
C**T
Effective for lightening dark spots and for moisturizing the skin
Although this product is expensive, I find it effective for lightening sun damaged skin and for moisturizing. It is easy to apply and is very lightweight.
I**E
Off-putting smell, questionable effectiveness
I used this everyday for quite awhile but I can’t tell if it did anything to improve my melasma beyond moisturizing my skin. I really don’t like the smell of this, it’s an unpleasant plasticky smell that would make me choose something else next time. Also expensive!
A**R
It works
Hey yall !!! I cannot say enough great things about this product!!! Im a 63 yr old female living in S Texas and im outside ar the pool in the summer. Even though I wear a 50 spf!? I still got dark uneven blotches and spots. After using this product for one week yes one week my skin is evening out and looks great. Im getting compliments on my skin. Love this, and ive used everything on the market. That didn't work , this works and will speak for itself inside of a week. It's an absolute must in your morning regin. Don't hesitate please your skin will thank you. Mrs Robin
V**A
Great for prevention
I bought this to lessen my pigmentation, but I didn’t see much of a difference. What I did notice was my melasma and other hyperpigmentation did not worsen and I did not get any new pigmentation from being in the sun! I use this every day. It didn’t cause acne or fungal acne. For me, this is a good product to use alongside other serums that remove dark spots/melasma.
M**V
ワントーンあがる
肌がワントーン明るくなめらかになるので愛用してます。3本目です。
S**M
Orijinal
Bence orijinal amazon gönderici satıcılı dan alın kokusu güzel rengi açık şeftalı pembe arası, ben cildiye doktorumun tedavi planı için aldım içindeki melasyl in alternatifi muadili ürün yok maalesef diğer bileşen zaten niacinamide henüz üç haftadır kullanıyorum net bi etki görmedim tüm yaz devam
H**S
eerlijkheid !
perfect spul ,helaas 50 ml besteld en 30 ml ontvangen
M**V
Un producto de 10. (Pero el envío ha sido penoso esta vez)
Compré este producto en octubre del 2025 y lo he vuelto a comprar (aunque esta vez me llegó chafado). Pongo cinco estrellas porque el producto las merece. Pero añado las imágenes de cómo me ha llegado esta vez. En fin, la dermatóloga me recomendó este sérum en concreto porque después del verano tenía manchas solares en el rostro. Y porque la Niacinamida tiene más propiedades de lo que creemos: Despigmentante, poros, rojeces Después de tres meses y medio utilizando este sérum, las manchitas se han difuminado más o menos en un 50%. Puede parecer poco, pero hay que tener en cuenta que comencé a aplicármelo poco a poco, porque este sérum contiene un 10% de Niacinamida, que es bastante si no estás acostumbrada... aunque haya despigmentantes más potentes. Comencé 1-2 noches por semana, y ahora me lo aplico 3-4. Incluso lo combino con el limpiador. ¡Voy subiendo en intensidad antes de que llegue el verano! Por qué me gusta 1. La Niacinamida es un componente que ahora incluyen muchos productos. Es despigmentante, antioxidante, actúa sobre el sebo y los poros, refuerza la barrera cutánea, actúa sobre las rojeces... Yo combino o alterno este sérum con Vitamina C y Retinol. Funcionan de manera distinta 2. Otra razón por la que me gusta este sérum es por su segundo componente, el Melasyl. Este es un activo patentado por L'Oréal y lo veréis en otros productos que parecen otras marcas pero pertenecen a L'Oréal, como por ejemplo, Vichy. Lo que hace el Melasyl, dicho así en bruto y sin entrar en tecnicismos es que no inhibe la producción de melanina, sino que evita que se formen manchas. Si utilizáis despigmentantes, sabréis que hay muchos activos que son más potentes, como el ácido kójico, azelaico etc. Estos inhiben directamente la producción de la melanina. El Melasyl, que tiene muchas búsquedas en Internet, dicen que es una de las moléculas eficaces para despigmentación y prevenir manchas. ¡Veremos lo de prevenir! 3. Incluye más componentes, como por ejemplo, un derivado del ácido salicílico, que es más suave que el ácido salicílico y cuya función es exfoliar suavemente, mejorar textura de la piel y complementarse con la Niacimamida y el Melasyl. 4. También incluye un retinoide suave, para mejorar la textura de la piel poco a poco y mantener la piel joven y elástica. 5. Y como no, también contiene agua termal. ¡Un clásico de La Roche Posay que calma la piel! En definitiva, es un sérum muy completo que puede aplicarse tanto de día como de noche y que no sólo elimina manchas, también las previene y mejora el estado de la piel. Con este frío, noto mucho los días en que no me aplico el sérum. Qué no me ha gustado: Como ya he comentado al principio, la caja vino chafada, como si alguien la hubiese abierto. Y además, el producto viene bocabajo. Parece más una devolución de alguien que lo ha vuelto a meter torpemente en la caja que un producto nuevo. Es la primera vez que me sucede y espero que la última. No se puede entregar un producto así, y menos un producto de cuidado de la piel. Es más, no quiero que me lo cambien. Directamente, me iré a la farmacia. Incluyo fotos del producto bueno, que se me está agotando, y fotos del producto "nuevo" que me ha llegado.
Trustpilot
3 days ago
2 weeks ago