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Cosmeceutical Skincare - dermoi
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Black Friday Upgrade: The Science-Backed Formulas That Transform Your Skin

October 09, 2025

Ahead of Black Friday, get to know our fan favourite products. The tried-and-true, well-loved and much-tested beauty shelf go-to’s that are clinically proven to enhance your glow.

Author: 
Vedika Pimple

Reading time: 7 minutes

The beauty and wellness industry is buzzing with excitement for one major event that presents the perfect chance to invest in top-notch, science-backed essentials: Black Friday. This is a golden opportunity to enhance your routine with professional-grade products that deliver real, transformative results. At Dermoi, we’re all about effectiveness and independent scientific validation, which means every product we support is grounded in solid clinical research.

This year, our Black Friday spotlight is on the true fan favourites, the scientifically advanced bestsellers that our community absolutely loves. These are smart, long-term investments in your skin and hair health, meticulously crafted by leading brands to truly deliver on their promises.

Black Friday Favourites

Viviscal Pro Hair Growth Tablets

Save: 13% Original price was: £60.00.Current price is: £51.95.

Obagi Nu Cil Eyelash Serum

Save: 25% Original price was: £105.00.Current price is: £78.95.

MEDIK8 LIQUID PEPTIDES ADVANCED MP

Medik8, a pioneer in science-led skincare, continues to revolutionise anti-ageing innovation with its Liquid Peptides Advanced MP, a next-generation serum powered by Dual MiniProteins™ technology. This innovative formula is clinically shown to diminish the look of expression lines in just 10 minutes and tackle deep-set wrinkles in 8 weeks. With a pharmaceutical-grade approach and peptide-powered performance, it’s a game changer. 

The Expression-like MiniProtein™ works to relax and smooth out those lines, visibly reducing wrinkle depth, while the Growth Factor MiniProtein™ boosts collagen, elastin, and hyaluronic acid production, enhancing your skin’s structure and firmness. Packed with a 30% multi-peptide complex, featuring copper peptides and Matrixyl 3000™, it rejuvenates your skin’s youthful texture and resilience. Acting like a molecular “key” that unlocks your skin’s natural ability to regenerate, liquid peptides advanced MP provides a filler-like effect for smoother, firmer, and more youthful-looking skin, clinically tested and proven for all skin types and tones.

Black Friday Medik8 Product Deals

MEDIK8 ADVANCED NIGHT RESTORE

Medik8 has launched Advanced Night Restore - a remarkable overnight cream crafted to align perfectly with your skin’s natural repair cycle. As you sleep, your skin enters its most intensive regeneration phase; this innovative formula enhances that process to deliver visibly youthful, plumper, and firmer skin by morning. Clinically shown to diminish stubborn wrinkles and give your skin a lift in just 7 days, it leaves your complexion feeling deeply nourished, soft, and comforted.

It is powered by: 

  • Multi-Ceramide Complex: This complex works wonders by replenishing the essential lipids - ceramides, cholesterol, and fatty acids that create the skin’s protective barrier. This carefully curated blend not only strengthens your skin’s natural defences but also locks in moisture, ensuring you enjoy lasting hydration and comfort, even after using strong actives like vitamin A. 
  • Midnight Antioxidant Complex: The complex is packed with superfoods like saskatoon berry and dragon fruit extract, which work their magic overnight to combat daily free radical damage from pollution and UV rays.
  • Retinaldehyde: A cutting-edge form of vitamin A that’s shown to be up to 11 times more effective than regular retinol, this formula targets fine lines, wrinkles, and uneven texture without causing irritation. 

The formulation also contains hyaluronic acid and glycerin deliver deep hydration, while vitamin E enhances antioxidant protection. Plus, N-acetyl glucosamine helps your skin naturally produce more hyaluronic acid for that lasting smoothness. Advanced Night Restore is your go-to for achieving a visibly rejuvenated and youthful complexion.

MEDIK8’S CRYSTAL RETINAL

A revolutionary vitamin A serum that transforms skin with visible age-defying power, smoothing stubborn wrinkles, brightening dark spots, and firming the complexion without irritation. It’s also powered by retinaldehyde, a cutting-egde form of vitamin A that delivers impressive results while being gentle on your skin. 

What sets Crystal Retinal apart is its unique progressive ladder system, which features six different strengths ranging from 0.01% to 0.24% retinaldehyde. This allows you to gradually build up your skin’s tolerance and consistently enhance your results over time. This “step-up” method ensures that your skin gets the most rejuvenating benefits while keeping sensitivity to a minimum.

Clinically proven and highly praised by dermatologists, Crystal Retinal’s patented stability system ensures unmatched potency, making it the UK’s top dermatological face serum for achieving visibly youthful, radiant, and healthy-looking skin.

Black Friday Medik8 on Sale

VIVISCAL PRO HAIR GROWTH

To achieve noticeably thicker hair, it’s all about giving your follicles the right nutrients that are backed by science. Viviscal Pro Hair Growth tablets take a powerful, multi-ingredient approach to help extend the hair growth cycle.

At the heart of this formula is the proprietary AminoMar® Marine Complex. This isn’t just any protein blend; it’s clinically proven to nourish thinning hair by prolonging the growth phase of the hair cycle. This means less shedding and more time for your hair to grow long and full.

The formula is enhanced with:

  • Biotin (vitamin B7): This vitamin is crucial for metabolising fats and amino acids, directly supporting your body’s natural production of keratin, which is the main structural protein in hair.
  • L-Cystine and L-Methionine: These essential amino acids are the building blocks of keratin. Including them ensures that when new hair grows, it’s strong and resilient.
  • Apple Extract (Procyanidin B-2): Studies suggest that this compound can naturally stimulate hair follicles, promoting even more growth and density.

By delivering these targeted, high-impact ingredients directly into your bloodstream, Viviscal Pro creates the ideal internal environment for advanced, drug-free hair growth.

OBAGI NU CIL EYELASH SERUM

With more than 30 years of experience in dermatology, Obagi is at the forefront of medical-grade skincare innovation. The Obagi Nu-Cil Eyelash Serum is a game-changing formula crafted to help you achieve visibly fuller, thicker, and more defined lashes. Thanks to its NouriPlex® Technology, it nurtures the natural lash cycle, promoting stronger and healthier growth.

Key Ingredients:

  • Biotin: This essential nutrient supports keratin production, which is crucial for healthy and resilient lash growth.
  • Proprietary Lipid Compound: The unique blend enhances the lash cycle, giving you a denser and fuller look.
  • Sodium Hyaluronate: A powerful hydrator that draws in and retains moisture, making your lashes softer and more flexible.
  • Panthenol (Vitamin B5): The ingredient conditions, nourishes, and strengthens your lashes, boosting their vitality.

Clinically tested and approved by ophthalmologists, the Obagi Nu-Cil Eyelash Serum offers progressive results with daily use, revealing longer, healthier, and beautifully defined lashes. You can find it at Dermoi, the official UK retailer of Obagi.

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