The ESK blog
Why targeting pigmentation from one angle is not enough: what the research shows
02 July 2026
Dr Anne Thomson
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Written by Dr. Anne Thomson
Pigmentation issues are a common skin concern and can be one of the most aging (and distressing). If you’re just starting out on your pigmentation journey or you’ve been faithfully applying a serum for pigmentation or investing in an anti-pigmentation cream - only to see minimal change - you’re not alone! Treating pigmentation can feel frustratingly slow, inconsistent, and at times, completely ineffective.
The reason? Most people are only addressing one piece of a much larger puzzle. Research shows that hyperpigmentation isn’t driven by a single pathway. It’s a complex, multi-step biological process - and if your routine isn’t targeting multiple stages, you’re unlikely to see meaningful, lasting results.
Let’s take a closer look at why pigmentation is so stubborn—and more importantly, how to treat it effectively using a multi-pathway approach.
Why is pigmentation so hard to treat?
Pigmentation (or hyperpigmentation) occurs when excess melanin - the pigment that gives skin its colour - is produced and unevenly distributed in the skin.
A number of factors play into this including the aging process, cumulative effects of UV exposure, hormonal factors (e.g. melasma), genetics, inflammatory conditions like acne and skin injury.
But here’s the key insight: melanin production isn’t a single event. It’s a chain reaction involving several steps:
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The signal: UV radiation or inflammation triggers pigment-producing cells (melanocytes)
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The activation: the enzyme tyrosinase activates the production of melanin
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The transfer: melanin is packaged into melanosomes which are transferred into surrounding skin cells
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The deposition: the melanosomes release their melanin and these pigmented cells accumulate in the skin and are eventually shed in a continuous cycle
Most treatments - whether a serum for pigmentation or an ointment for skin pigmentation - focus on just one of these steps. That’s why results can plateau. To truly improve pigmentation, you need to interrupt this process at multiple points.
Pathway 1: How Vitamin C interrupts UV-triggered pigmentation
Vitamin C is well known as an effective antioxidant in the skin and helps combat hyperpigmentation by acting at the very beginning of the pigmentation pathway by:
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Neutralising free radicals caused by UV exposure, reducing oxidative stress that triggers melanocytes
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Blocking tyrosinase, the enzyme that is essential in the production of melanin
In simple terms, Vitamin C acts like a protective buffer. It doesn’t just treat pigmentation - it helps stop it from forming in the first place.
And speaking of UV, don’t forget your DAILY SUNSCREEN! Blocking the UV rays hitting your skin in the first place is key to preventing the trigger for melanin production. Choose a broad-spectrum sunscreen (blocks both UVA and UVB rays), and wear it all day, every day of the year, not just beach days in summer. A sunscreen containing zinc is your best bet.
C Forte
C Forte Morning Serum is packed with 16% L-ascorbic acid, the purest form of Vitamin C, combined with vitamin E and ferulic acid for maximum results. Vitamin C (Ascorbic Acid) is an anti-oxidant helping neutralise free radicals (associated with exposure to the sun). The result? A brighter, firmer, plumper looking skin with fewer fine lines apparent and a more even skin tone. Formulated at the ideal pH (2.5-3.5) and housed in airless, opaque packaging, C Forte ensures stability and effectiveness, delivering radiant skin with every use.
Featuring;
- Evidence based ingredients and formulations for superior efficacy.
- Potent skin brightening ingredients
- A plumper, more hydrated and even toned skin.
Note: C Forte can exacerbate acne and may be too strong for irritable skin.
Pathway 2: How tyrosinase inhibitors like 4-N-Butylresorcinol work as a pigment inhibitor
At the core of melanin production is an enzyme called tyrosinase. If you block this enzyme, you effectively reduce melanin production at its source.
This is where tyrosinase inhibitors come in and why they are usually considered a key pathway for long term management of hyperpigmentation - particularly advanced options like 4-N-Butylresorcinol (4NB).
4NB works by:
4-N-Butylresorcinol is considered one of the more potent options in modern hyperpigmentation treatment and has been shown to be more effective than hydroquinone, arbutin and kojic acid whilst being exceptionally gentle on the skin.
If you’re using an ointment for skin pigmentation or anti-pigmentation cream without an effective tyrosinase inhibitor, you’re missing a critical step in the process!
Enlighten Gold
Meet your new secret weapon against uneven skin tone. Enlighten Gold is a lightweight moisturiser designed to help reduce the appearance of pigmentation.
We've blended high strength 4nB (a gentle, and highly effective pigmentation fighter) with PHAs (think of them as a soft exfoliant that plays nice with sensitive skin) and niacinamide to support your skin’s barrier to effectively improve your skin. Whether your skin is oily, dry, or somewhere in between, this pigmentation moisturiser fits right in.
Why you'll love it:
- Fades dark spots and uneven tone without irritation.
- Lightweight and hydrating, works on all skin types, including sensitive skin.
- PHAs gently exfoliate while 4nB targets pigmentation.
For best results, use Enlighten Gold in the morning and Ultimate A Gold at night (available together in our Golden Duo). This AM/PM approach targets pigmentation while supporting long-term skin change.
Pathway 3: How Niacinamide blocks melanin transfer
Even after melanin is produced, we still have another chance to prevent visible pigmentation. This is where niacinamide (Vitamin B3) comes in.
Niacinamide works by:
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Inhibiting the transfer of melanin from melanocytes to keratinocytes (skin cells)
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Supporting the skin barrier, which helps reduce inflammation-driven pigmentation
Think of it as stopping the “delivery system” of pigment.
Shop ESK Niacinamide Collection
Repair +
Repair + is a moisturiser formulated to support skin hydration and barrier function. Its combination of niacinamide, panthenol, hyaluronic acid, and ceramides is designed to help maintain skin moisture, strengthen the barrier function of the skin, reduce the appearance of redness, and support overall skin texture.
Key Features:
- Ingredients to support hydration and skin barrier function
- Formulations to help reduce the appearance of redness and visible skin irritation
- Scent-free, paraben-free, and sulphate-free
- Super effective but gentle enough for daily use
Pathway 4: How Retinal and AHAs treat existing pigmentation
Once pigmentation is already visible, prevention alone isn’t enough—you need to actively remove it. Two of the most effective ways to do this are with:
Retinal (Vitamin A)
Retinal, aka retinaldehyde, targets pigmentation mainly by accelerating skin cell turnover, helping shed pigmented cells more quickly. It also:
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helps skin cells disperse the melanin packets, preventing them from getting “stuck” and clumping together
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helps reduce tyrosinase, the enzyme that facilitates melanin production
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enhances the penetration of other pigment-busting active ingredients, like AHAs
Retinal is the best tolerated form of vitamin A on the skin, with faster results and less side-effects than its old-school cousin retinol. Even sensitive skin types can usually tolerate retinal.
Ultimate A Gold
Ultimate A Gold: the most effective and gentle ingredients that evidence based cosmeceutical skincare has to offer, in one revolutionary formula.
The game-changing night cream developed in partnership with Selma Blair - combines our most potent hero ingredients to effectively and gently tackle the most common skin concerns – in one product.
Tackling the signs of aging skin including fine lines, skin elasticity, impaired barrier function, hydration, dullness and uneven skin tone. it is our most powerful product yet and yet it’s still ridiculously well tolerated.
Wake up to skin that's supple, smoother, and softer.
For the most irritable of skin, Ultimate A may be a better option, particularly when starting to use Retinal based products
*Ultimate A Gold (Retinal) may transfer onto white or light-coloured fabrics. For best results, we recommend using darker clothing or surfaces to avoid visible marks.
AHAs (Alpha Hydroxy Acids)
AHAs, like glycolic or lactic acid, exfoliate the surface of the skin by dissolving the bonds between dead skin cells, helping to flush out pigmented cells more quickly (and importantly, gently).
This helps:
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Reveal fresher, more evenly toned skin
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Improve the effectiveness of other pigment-busting active ingredients
Together, retinal and AHAs form a powerful combination for treating existing pigmentation—rather than just preventing new spots from forming.
Smooth Serum
Smooth Serum is a night treatment formulated with 3% Glycolic acid, 1% Lactic acid, and 1% Gluconolactone. This gentle AHA blend supports the appearance of skin texture and surface renewal, helping maintain the look of even skin tone.
Key features:
- Combination of alpha hydroxy acids to support skin texture
- Supports the appearance of smoother, more even skin
- Can be used alongside products containing Retinal to maintain overall skin texture
Caution: Not recommended for very sensitive skin or skin prone to rosacea.
Why the best serum for pigmentation targets multiple pathways at once
By now, a pattern should be clear! Each ingredient tackles a different stage of pigmentation:
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Vitamin C → prevents UV-triggered signals
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Tyrosinase inhibitors → reduce pigment production
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Niacinamide → blocks pigment transfer
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Retinal + AHAs → remove existing pigment
If you rely on just one, you’re only addressing part of the problem. This is why the most effective serum for pigmentation isn’t a single hero ingredient - it’s a system. Research consistently shows that combination approaches outperform single-ingredient treatments, especially for stubborn or long-standing pigmentation.
Building your anti pigmentation routine: the ESK approach
At ESK, our philosophy is evidence-based: target pigmentation from every angle. Rather than relying on a single ingredient anti-pigmentation cream, ESK formulations are designed to work synergistically across multiple pathways.
Two standout options include:
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The Golden Pigmentation Duo — a streamlined approach to layering key actives effectively
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The Pigmentation Kit — a comprehensive routine targeting all stages of pigmentation
This duo pairs high-performance, evidence-based formulations which are gentle on your skin, but not on hyperpigmentation. It’s designed to tackle uneven skin tone and texture. It also helps to support hydration, the skin barrier and skin roughness. If that’s not enough it is also excellent for helping keep your skin looking younger, brighter and more vibrant! Golden Duo contains: Enlighten Gold: A moisturiser powered by PHAs, Niacinamide and 4nB to help support barrier function and hydration while reducing the appearance of uneven skin tone and dark spots. Ultimate A Gold: A next-generation Retinal based night cream that helps refine skin texture and visibly smooth fine lines for firmer, more even-looking skin. And with a long list of ingredients including 4nB it also helps zero in on uneven looking skin tone.
Golden Pigmentation Duo
Ultimate A Gold (Retinal) may transfer onto white or light-coloured fabrics. For best results, we recommend using darker clothing or surfaces to avoid visible marks.
The Pigmentation Kit combines evidence-based ingredients designed to support a refreshed skin and a more even skin tone while restoring hydration. Key features: Retinal is not suitable for use during pregnancy or while trying to conceive. We've swapped Ultimate A with the new Ultimate A Gold. If you prefer Ultimate A, you can build your own kit here.
Pigmentation Kit
C Forte can exacerbate acne and may be too strong for irritable skin.
This layered approach ensures you’re not just treating pigmentation—you’re preventing, interrupting, and reversing it simultaneously!
Frequently asked questions
What causes pigmentation on the face?
We need some pigment in our skin to absorb and scatter UV radiation to protect our DNA from damage. Pigmentation becomes an issue when melanin is produced in excess, in the wrong place, or unevenly. This can show up as sun spots (solar lentigines), melasma (often hormonal) or post-inflammatory hyperpigmentation (marks left after acne, eczema or injury including some skin treatments).
Common triggers include:
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Sun exposure (the biggest one)
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Hormonal changes like pregnancy or the contraceptive pill
How long does it take to fade pigmentation?
There’s no getting around it, pigmentation can be stubborn, frustrating, and slower to fade than we’d all like. Pigmentation is not surface level; once excess pigment has been produced, especially after inflammation or sun exposure, it can sit deep in the skin. That means results are measured in months, not weeks; most effective treatments need 8-12 weeks before you see meaningful change, and longer for deeper pigmentation like melasma. And it is usually (in the case of hormonal and long term sun exposure) a relapsing condition - that means that it will usually come back if it’s not managed long term.
Consistency and a multi-pathway approach are key. Don’t forget to protect your skin from the sun, calm inflammation, target pigment production gently, support the skin barrier, and most importantly, give it time.
What is the most effective ingredient for hyperpigmentation?
There isn’t a single “best” ingredient. The most effective hyperpigmentation treatment combines multiple actives to target the multiple pathways—vitamin C, niacinamide, retinal, and tyrosinase inhibitors and of course daily sunscreen. But if you have to choose just one ingredient (and you shouldn’t have to, it would be a tyrosinase inhibitor like 4-n-Butylresorcinol.
Can you use Vitamin C and Niacinamide together for pigmentation?
You sure can! These ingredients have been shown to work well together and target different stages of pigmentation, making them more effective when combined. BUT we would not recommend using one product which combines both ingredients!
While Vitamin C (L-Ascorbic acid) is a great ingredient, it is inherently unstable and combining it with Niacinamide has two problems. i) product shelf life and efficacy will be compromised with the Vitamin C oxidising about twice as fast when paired with Niacinamide and ii) Vitamin C needs a low pH (below 3.5) to reduce oxidisation, but a low pH (of 4 or less) converts Niacinamide to Niacin. That changes a well tolerated ingredient to one which is irritating.
So if you use them together, make sure it is in two separate products.
Does retinal help with pigmentation?
Indeed it does - retinal helps to fade pigmentation by increasing skin cell turnover which flushes pigment out of the skin, reducing the melanin-producing effects of tyrosinase and enhancing the effects of other ingredients like AHAs. Not only that, it’s the most efficient of the over-the-counter retinoids and the best tolerated, suitable even for sensitive skin-types.
What is a tyrosinase inhibitor?
A tyrosinase inhibitor is an ingredient that blocks the enzyme responsible for melanin production. Less tyrosinase = less melanin. If you haven’t got an effective tyrosinase inhibitor in your pigmentation line-up, you’re missing a crucial step! Examples of tyrosinase inhibitors in skincare include 4-N-Butylresorcinol (4NB), hydroquinone, arbutin and kojic acid. Of these, 4NB has been shown to be more effective, safer and exceptionally gentle on the skin.
Is pigmentation permanent?
Not usually—but it can be persistent, lasting months or sometimes years. With the right routine and consistency, most pigmentation can be significantly reduced. Getting a diagnosis, sometimes requiring referral to a dermatologist, is important in persistent cases because the deeper in the skin the pigmentation issue is, the harder it is to treat with topical therapies.
What is the difference between melasma and hyperpigmentation?
Hyperpigmentation is a broad term for any darkening of the skin. Melasma is a specific type, often hormonally driven, that appears as symmetrical patches—commonly on the face.
The bottom line
If you’ve been wondering how to treat pigmentation or your current anti-pigmentation serum or cream isn’t delivering results, it may not be about trying harder - it’s about treating pigmentation smarter.
By targeting multiple pathways at once, you’re giving your skin the best possible chance to correct, rebalance, and restore a more even tone.