La Roche-Posay Mela B3 Serum, 10% Niacinamide, 30ml

La Roche-Posay Mela B3 Serum is a 30ml face serum formulated with Melasyl and 10% niacinamide for dark marks and hyperpigmentation. The listing describes a lightweight gel-serum for sensitive skin and says to use 3–4 drops morning and/or evening, followed by daily SPF in the morning.

At a glance

Melasyl and 10% niacinamide are presented as the formula's key actives for dark marks and pigmentation.
The listing describes a lightweight, quick-absorbing gel-serum without a sticky feel.
Directions specify application after cleansing and daily SPF as the final step in a morning routine.
The manufacturer reports reduced dark spots for 94% of subjects after twelve weeks of regular use. This is a manufacturer claim, not an independently verified result.

Price

£28.55Save 41%

Reference price: ~~£48.00~~

Price checked: 12 Nov 2026

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Pros and cons

Pros

Targets hyperpigmentation and post-acne marks, a focused option for uneven tone rather than a general-purpose moisturiser.
The listed lightweight gel-serum texture and quick absorption may suit routines where a less sticky finish is preferred.
The listing describes the formula as hypoallergenic and alcohol-free for sensitive-skin comfort.

Technical specifications

9 specifications

Identity
Brand	La Roche Posay
Model	LRMBSR30
Product type	Face serum
Volume	30ml

Formula and use
Key ingredients	Melasyl, 10% Niacinamide and Retinol
Texture	LIGHTWEIGHT GEL-SERUM TEXTURE
Use directions	After cleansing, apply 3-4 drops morning and/or evening to face and neck. Always complete your morning routine with a daily SPF,

Dimensions and installation
Dimensions listed	3.55 x 5.5 x 10.9 cm; 30 g

Origin
Country of origin	France

What to know before buying

Listing details to confirm

The listing describes retinol in the ingredient details, while its headline and feature copy emphasise Melasyl and 10% niacinamide. Check the current ingredient list if retinol content or tolerance is important. The twelve-week efficacy statement is a manufacturer claim. Morning use should be followed by SPF, as directed.

Who is it for?

A good fit for

People seeking a face serum aimed at dark spots, hyperpigmentation or post-acne marks.
Those who prefer a lightweight gel-serum and want a product listed for sensitive skin.
Buyers comfortable following a regular routine and using daily SPF after morning application.

Less suited to

Those looking for a serum with no retinol, unless the current ingredient list confirms that it is absent.
Anyone seeking a fragrance-free product without first checking the ingredient list, as customer reactions to fragrance are mixed.

La Roche-Posay Mela B3 Serum, 10% Niacinamide, 30ml · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.3 / 5 · 15,900 ratings

5 stars69%69%
4 stars11%11%
3 stars10%10%
2 stars2%2%
1 star8%8%

Customer feedback is positive about perceived product quality, skin texture and absorption, including reports that it blends into skin easily. Experiences with skin improvement are mixed, as are opinions on value and fragrance. For buyers considering its stated dark-mark and post-acne focus, the reported variation in results is relevant, and fragrance reactions may matter if sensitivity is a concern. The overall rating distribution is mostly five-star but includes a notable one-star share, so it does not establish a uniform experience.

Positive themes

Customers describe the serum positively for quality and skin texture.
Some customers praise how it absorbs or melts into the skin.

Mixed feedback

Reports of skin improvement differ, with some customers saying it works and others reporting no improvement.
Opinions on value for money are divided.
Fragrance receives both favourable and unfavourable reactions.

Frequently asked questions

How is the serum used?

After cleansing, apply 3–4 drops to the face and neck in the morning and/or evening. The listed directions say to finish a morning routine with daily SPF.

What does the serum target?

The listing positions it for dark spots, hyperpigmentation and post-acne marks, using Melasyl and 10% niacinamide.

Does it contain retinol?

The manufacturer details mention retinol alongside Melasyl and 10% niacinamide, although the headline focuses on the latter two. Check the current ingredient list if this matters to you.

What do customers report about results?

Feedback is mixed on whether it improves skin. Some customers report improvement, while others say they noticed none, so results should not be assumed.