Lighten and brighten
4-N-Butylrescorcinol
Target dark spots with ESK's 4-N-Butylresorcinol skincare. This powerful ingredient inhibits melanin production, offering a safer alternative to hydroquinone for a brighter complexion.
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Showing 7 products
$125
$150
$62.50
Customer reviews
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Alida H
Hydroxy Cleanser, C Forte, Enlighten Gold, Zinc Shade, Smooth Serum, Hydraboost HA Serum, Ultimate A Gold
"So i’ve been using ESK for about 6 weeks now and i’m super happy with the results. Photo (no filter on either) on the left is before incase it’s not obvious. I have the pigmentation kit and it has made my skin feel amazing. I think there’s a difference in appearance as well. I love the ritual of putting on the different steps morning and night and I will continue using the kit now as it’s part of my daily ritual."
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Anna D
Mature Lighten & Tighten Kit*, Mature Skin Anti-Aging Kit*, Calming Cleanse, Enlighten, Zinc Shade, Smooth Serum, Ultimate A
"Here are my before and after photos taken 5 weeks apart. I am really enjoying my ESK skincare. My biggest concern was my uneven skin tone due to sun damage. I think after using these products for such a short time the difference is remarkable. My skin feels hydrated and plump and the tone is much more even. I highly recommend these products as they are very easy to use with the am and pm marked on the bottles. They really do work."
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Antoinette G
Mature Lighten & Tighten Kit*, Mature Skin Anti-Aging Kit*, Calming Cleanse, Enlighten, Zinc Shade, Smooth Serum, Ultimate A
"Can you turn back the years? Perhaps not but it appears that you can minimise the damage that many of them caused. I have the Mature Pigmented Kit and I love it. These two photos were taken at the same time in the morning bot with no products on and a month apart. I think that my skin looks brighter, smoother, healthier and thankfully younger."
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Carol C
"At first, I wasn’t sure how well it worked, but now that I’ve seen the comparison photos, I’m really impressed. It’s way better than I thought it was going to be. When I first started using it the first couple of days, I thought there was a bit of tightness and dryness, but when I got used to using it, I realised that wasn't really the case, I think it was just a case of my skin settling down. A couple of times I had to use the Enlighten on the evening, but other than that I just stuck to my usual cleanse, tone, serum and then using the Enlighten and I've been really pleased with the results."
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Cathy S
Calming Cleanse, Enlighten, Zinc Shade, Smooth Serum, Ultimate A, Mature Lighten & Tighten Kit*, Mature Skin Anti-Aging Kit*
"I was very sceptical about this skin care range can it do what it claims to, it most certainly can I have noticed a big change to my skin it is alot clearer feel of redness and my pigmentation has improved ALOT! So if in doubt try it you will be very happy with the results and so little is needed so will last a long time alot more than other products on the market😊😊 plus not much makeup will be needed to cover skin as it glows"
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Celia C
Sensitive Breakout Prone/Pigmented Kit*, Calming Cleanse, B Calm, Zinc Shade, Ultimate A, Hydroxy Overnight Mask
"My skin feels amazing. I'm still having the occasional hormonal outbreak but mostly my skin is healing and so is my confidence to leave the house without makeup. Thank you so much."
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Charlotte C
Hydroxy Cleanser, C Serum Lite, Enlighten, Zinc Shade, Smooth Serum, Ultimate A, Pigmentation Kit*, Acne-prone/Oily kit
"Skin is definitely smoother after 30 days of use. I personally love the enlighten cream, it's so light on my skin. Thanks team for the amazing products! "
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Danielle D
Pigmentation Kit*, Hydroxy Cleanser, C Forte, Zinc Shade, Smooth Serum, Enlighten, Ultimate A
"It is still a work in progress but I am so relieved to finally see results. I never had any pigmentation issues until about two years ago. I have tried so many different products and treatments which has just made my pigmentation worse. I cannot be happier as ESK has given back my confidence and I am able to face the world again without makeup!"
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Dee-Anna R
"This product has been amazing! I thought I’d try the new Ultimate A gold. My skin is finally back to normal after suffering dryness and break outs. It’s taken a few months but I couldn’t be happier."
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Eb C
Enlighten, Ultimate A+, Hydroxy Cleanser
"Honestly it's truly amazing! I will shout it from the roof tops!"
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Elissa M
Mature Lighten & Tighten Kit*, Mature Skin Anti-Aging Kit*, Calming Cleanse, Enlighten, Zinc Shade, Smooth Serum, Ultimate A
"I have been using the range for around 5 weeks now and I really love the products. I have the range for Mature pigmented skin and the difference the products have made is noticeable for me. I had quite a lot of redness and lots of pigmentation. I always felt embarrassed not wearing a full coverage foundation. I also had skin that felt and looked tired with some dry patches. I noticed a difference in how my skin felt in the first week. By week 2 I was starting to see a softening of the pigmentation. 5 weeks in and I can really see the improvement. Simple regime, great products, practical packaging and excellent service."
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Emily G
Mature Lighten & Tighten Kit*, Mature Skin Anti-Aging Kit*, Calming Cleanse, Enlighten, Zinc Shade, Ultimate A
"I have been using the ESK range recommended for eczema for one month and can already see pigmentation lightening and a softening of fine lines of my face. I had been using a very basic skin care regime so I had some concerns about using ESK initially given there were 5 different products (including a cleanser), but the products are very easy to use, the numbering on some of the products assists with this. They also smell great and feel wonderful on my skin, even the all important Zinc Shade."
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Emma N
Pigmentation Kit*, Calming Cleanse, C Forte, Enlighten, Zinc Shade, Smooth Serum, Ultimate A
"I can’t believe how much my pigmentation has settled down after 1 month. Also breakouts have disappeared. I’m so impressed. The products are divine! Thank you!!"
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Florence M
Mature Lighten & Tighten Kit*, Pigmentation Kit*, Calming Cleanse, Enlighten, Zinc Shade, Smooth Serum, Ultimate A
"I followed the morning and evening routine to the letter. I noticed some improvements on my skin texture, smaller pore size and skin glowing/looking very healthy .Is it a miracle cure? My pigmentation did not disappear but I never expected that to happen in 4 weeks!! But it did noticeably improve. Did I like it? YES! So it is a big thumbs up from me from a quality perspective, it is gentle enough to apply everyday without any of the harsh side effects of general targeted treatments yet effective!"
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Gayle R
Mature Lighten & Tighten Kit*, Mature Skin Anti-Aging Kit*, Calming Cleanse, Enlighten, Zinc Shade, Smooth Serum, Ultimate A
"After using ESK products I can see a remarkable difference in my skins appearance. I am using the pigmentation kit as I wanted to reduce the sun spots that have started to appear. My skin feels and looks a lot fresher. Thankyou for your products"
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Gemma C
Hydroxy Cleanser, C Serum Lite, Enlighten, Smooth Serum, Ultimate A
"My tailored ESK skincare set has exceeded all my expectations. I actually didn’t realise how dull and badly pigmented my skin was until seeing my own 4 weeks progress and honestly being in complete shock of the difference it has made! I feel so much more confident now to let my natural skin be on show and not having to hide it behind a face full of makeup. I will 100% continue to use this regime as if it can make this difference in just one month imagine what the long term results can be. Would highly recommend them to anyone that is facing their own skincare issues."
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Georgie S
Mature Pigmented Kit*, Calming Cleanse, C Forte, Enlighten, Zinc Shade, Smooth Serum, Ultimate A
"I am absolutely thrilled to share my experience with ESK. In just one month, I have witnessed incredible improvements in my skin. My complexion is now less red, and my skin feels nourished and hydrated. The best part is that the skincare routine is effortless, and my skin feels amazing instantly. I started with the trial size to test the products, and I am happy to say that I have ordered the full size, knowing that my skin will only continue to improve."
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Grace H
Hydroxy Cleanser, Enlighten, Zinc Shade, Smooth Serum, Ultimate A+, Hydroxy Overnight Mask, Acne-prone/Oily kit
"My skin has never been super great but it hasn't been super problematic either. It's that traditional combination skin that gets a lot of hormonal breakouts. At 31, I'm a little bit sick of having breakouts AND developing lines as well. I'm all for aging naturally and at the same time, slowing down the process and caring for my skin is important to me. I decided to try ESK because I appreciated the evidence base and the fact that the recommended starter kits didn't have a million different things to do. I work in a rewarding yet demanding job with long days and I need a skin-care routine that is simple and effective. ESK has definitely been that! I've been using it for just over a month now and I have definitely noticed a difference. My skin is a lot more firm and pigmentation has decreased. My usual monthly-hormone breakout was greatly reduced as well. One of the most wonderful aspects of my ESK journey so far has been the customer service. I have NEVER experienced such individualised, supportive customer service and I think that demonstrates how much this company actually wants to help their customers (rather than just getting their money). I highly recommend this brand of skincare and am so glad I found it."
What is 4-n-butylresorcinol?
Treating pigmentation is a marathon, not a sprint, with benefits often taking up to 3 months to appear. The ingredient, 4-n-Butylresorcinol directly inhibits the activities of tyrosinase and tyrosinase-related protein-1 (TRP-1) which are enzymes essential for making the melanin pigment in the first place. Other tyrosinase inhibitors, like Hydroquinone are as effective as 4-n-Butylresorcinol but can cause irritation and even rebound pigmentation when you stop using it. These are side effects we don’t see with 4-n-Butylresorcinol.
ESK’s 4-n-butylresorcinol skincare uses evidence-based formulations to tackle pigmentation. Our Enlighten has 0.1% 4-n-butylresorcinol with 5% Niacinamide to deliver effective results. For optimum results for pigmentation, we recommend combining Enlighten with our other evidence-based products in our Pigmentation or Multi Fade kits.
Not sure which one is best for you? Take our skin quiz for a curated skincare regimen or reach out to our customer service team for knowledgeable and sympathetic advice.
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