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As Featured In

Our Standard

Cell-to-Surface™

Most skincare is only tested on the surface. We believe our testing should match the ambition of our formulas. We independently validate the final formulation across three distinct dimensions:

Tested at the Cell

Biological Validation

We measure deep beneath the surface to ensure the formula actively supports your skin’s long-term structural health.

Measured on the Surface

Clinical Proof

We use advanced skin measurement instruments in independent trials to objectively track and quantify visible improvements.

Perceived in the Mirror

Consumer Validation

Science only matters if you can see the difference. We use independent user panels to confirm our deep cellular research translates into real-world, visible confidence.

LEARN HOW WE TEST

The Experts in Skin Ageing

  • 125+ Years

    Combined dermatological expertise

  • 900+

    Peer-reviewed scientific publications

  • Globally Renowned

    Experts in molecular skin ageing

  • Prof. Chris Griffiths OBE

    Chief Scientist & Founder

    Full Bio

    Chris Griffiths is Emeritus Professor of Dermatology, University of Manchester, Adjunct Professor, King’s College London and a Consultant Dermatologist, King’s College Hospital. He qualified in medicine from St Thomas’ Hospital Medical School and trained in dermatology at St Mary’s Hospital and the University of Michigan.

    In 2015, he received the Sir Archibald Gray Medal for outstanding service to British Dermatology, and in 2019 the BSID Medal for contributions to research.

    Chris was appointed OBE “for services to dermatology” in the 2018 Queen’s New Year Honours. He is a former President of the European Society for Dermatological Research, the European Dermatology Forum, the British Association of Dermatologists (BAD), and the International Psoriasis Council, which he co-founded in 2004.

    Chris has 791 PubMed-cited articles and is Editor-in-Chief of Rook’s Textbook of Dermatology and Rook’s Dermatology Handbook and received a lifetime achievement award from the American Skin Association in 2009.

    Professor Griffiths is past-President of the British Association of Dermatologists, European Dermatology Forum, British Society for Investigative Dermatology and International Psoriasis Council (which he co-founded in 2004).

    He was part of the team in Michigan that demonstrated that topical retinoids are efficacious in the management of ageing skin.

    Professor Chris Griffiths and his team have provided strong support to the success of all generations of Boots No7 anti-ageing serums and the No7 skincare range as a whole.

  • Dr. Clare Kiely

    Chief Medical Officer & Founder

    Meet Dr. Kiely

    Dr. Clare Kiely is a leading Consultant Dermatologist and highly specialised skin cancer surgeon. As a co-founder and the Chief Medical Officer of The Skin Diary, she brings together expertise in skin cancer science & clinically informed daily skincare. Her deep clinical understanding of how environmental damage impacts cellular health drives our mission to protect and fortify your skin for the long haul.

    Full Bio

    Clare Kiely is a Consultant Dermatologist, Dermatological and Laser surgeon in  London. She is highly specialised in a wide range of dermatological issues, with a specific interest in photodamage, skin cancer, mohs micrographic surgery, acne, acne scarring, and aesthetic dermatology. She has completed fellowships in Dermato-oncology and Mohs surgery in St Johns institute of Dermatology where she is an Honorary consultant. She is also an honorary lecturer in skin ageing and aesthetics in the University of Manchester where she completed the her masters degree. She is current Chair of the Cosmetic Practice Standards Authority and is on the executive committee of the British Cosmetic Dermatology Group. Dr Kiely is an active researcher in skin cancer with numerous peer-reviewed publications. She is an expert in squamous cell carcinoma & has led the supra-specialty non-melanoma skin cancer team at Guys Hospital.She is an invited speaker nationally & internationally on skin cancer treatment, Mohs surgery, lasers, photo ageing treatments and aesthetics.

    Other Projects

    Dr. Kiely remains an active, leading voice in clinical practice, patient safety, and dermatological research:

    • Patient Safety & Leadership: She is the current Chair of the Cosmetic Practice Standards Authority and serves on the Executive Board of the British Cosmetic Dermatology Group, working tirelessly to uphold the highest standards of clinical care across the industry.
    • Surgical Excellence: She maintains a highly specialised clinical practice at prestigious institutions, including as a director of Skin Associates at The Lister Hospital and Spire Harpenden Hospital, focusing on the surgical management of complex skin cancers and advanced laser treatments.
    • Academic Innovation: An active researcher with numerous peer-reviewed publications, she presents internationally on skin cancer treatment, photo-ageing, and lasers. She continues to pioneer gene-expression research and clinical trials in partnership with the University of Manchester.
    • Medical Education: She has been directly responsible for the advanced training of national and international medical fellows in Mohs Micrographic
  • Dr. Tamara Griffiths

    Head of Innovation & Founder

    Meet Dr. Griffiths

    Dr Tamara Griffiths is a world-renowned Senior Consultant Dermatologist and the current President of the British Association of Dermatologists. As Head of Product Innovation atThe Skin Diary, she leverages her unmatched expertise in skin ageing and aesthetic medicine to engineer formulations that deliver clinical-grade results while fiercely protecting the skin's barrier. She is a leading global advocate for patient safety and rigorous standards in the cosmetic sector.

    Full Bio

    Dr Griffiths has acted as advisor to the Department of Health’s Review of the Regulation of Cosmetic Interventions led by Sir Bruce Keogh published in 2013. She was instrumental in developing the Health Education England curricula and training frameworks for non-surgical cosmetic interventions (2015) and is a founding member and trustee of the Cosmetic Practice Standards Authority (CPSA), which launched in partnership with the Joint Council for Cosmetic Practitioners (JCCP) at the House of Lords in 2018. She is Medical Programme Director for the University of Manchester MSc in Skin Ageing and Aesthetic Medicine, which she founded in 2013 and now recognised as the gold standard in the UK and internationally, and is the Cosmetic Dermatology section editor for Rook’s Textbook of Dermatology.

    Her clinical team was awarded BMJ Dermatology Team of the Year in 2018, and in 2021 she was recognised by the British Association of Dermatologists as Clinician of the Year. In July 2024 she commenced her two year term as President of the British Association of Dermatologists. In 2026, she was awarded the American Academy of Dermatology's Presidential Citation for her leadership, education and advocacy serving the profession and patients.

    Other Projects

    Dr Griffiths is a formidable force in dermatological education and has been instrumental in driving vital patient-safety regulations across the UK aesthetic arena:

    • Pioneering Aesthetic Regulation: She acted as a key advisor to the Department of Health’s Review of the Regulation of Cosmetic Interventions (the Keogh Review) in 2013. Following this, she developed the Health Education England curricula and training frameworks for non-surgical cosmetic interventions in 2015.
    • Setting the Gold Standard: To further protect the public, she is a founding member and trustee of the Cosmetic Practice Standards Authority (CPSA), which launched in partnership with the Joint Council for Cosmetic Practitioners (JCCP) at the House of Lords in 2018.
    • Educational Leadership: She is the Medical Programme Director for the University of Manchester MSc in Skin Ageing and Aesthetic Medicine, aprogramme she founded in 2013 that is now recognised globally as the educational gold standard in the field. Additionally, after launching the BAD's British College of Dermatology in 2021, she was appointed as its inaugural Education Vice President in 2023
    • National and International Leadership: In July 2024, she commenced her two-year term as President of the British Association of Dermatologists, guiding the future of the profession and championing standards in research, education and clinical practice across the UK.She was awarded the Presidential Citation by the American Academy of Dermatology, for her contribution to leadership in dermatology practice, education and advocacy work in cosmetic dermatology regulation.
  • Dr. Richard Barlow

    Chair of Advisory Board & Founder

    Meet Dr. Barlow

    Dr Richard Barlow is a  Consultant Dermatologist with over 25 years of clinical expertise. As a sub specialist in skin cancer management and cosmetic dermatology, he brings a profound understanding of how to protect, preserve, and renew the skin's structural integrity. His decades of surgical and clinical experience ensure thatThe Skin Diary formulations meet the highest possible medical standards, delivering exceptional care without compromise.

    Full Bio

    With over 25 years of experience, he has been a Consultant Dermatologist at St John’s Institute of Dermatology since 1996 and during this time served on the Joint Tumour Service at Moorfields Eye Hospital.

    Specialising in skin cancer management, including Mohs’ surgery, cutaneous laser surgery, and cosmetic dermatology, he is a distinguished figure in the field. He was the Founding President of the British Cosmetic Dermatology Group and President of St John's Dermatology Society in 2009/10.

    His contributions include representing the BAD and BCDG at what was then the British Academy of Cosmetic Practice 2007 to 2016.

    Other Projects

    Dr Barlow is a recognised pioneer and leader within the UK's dermatological and aesthetic communities, having dedicated much of his career to elevating clinical standards:

    • Founding Leadership: He was the Founding President of the British Cosmetic Dermatology Group (BCDG), playing a vital role in shaping the standards of safe, effective aesthetic medicine across the UK.
    • Clinical Governance: He served as the President of the St John's Dermatology Society in 2009/10, guiding and representing one of the most respected dermatological associations in the country.
    • National Representation: Showcasing his influence at a national level, he represented the British Academy of Cosmetic Practice as a joint representative for both the BAD (British Association of Dermatologists) and the BCDG from 2007 to 2016, ensuring that clinical safety always remains at the forefront of cosmetic care.
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Pure Science. Proven Results

Real Results

3.7x Reduction in Collagen Damage

Our Age Defence day cream demonstrated a 3.7x reduction in collagen damage and a 3.8x reduction in inflammation markers when exposed to UV in an independant gene expression study.

2x Increase in Collagen

Night Repair Therapy was independently tested via the Manchester Patch Test Assay showing a 2x Increase in collagen and fibrillin.

20x More Effective Cellular Support

In the Manchester Patch Test Assay Night Repair Therapy outperformed the gold standard (prescription control). Equivalent of 20x more effective than retinol

98% Agreed our Formulas were Gentle on Skin

We formulate each product with a synergy of ingredients designed to provide profound results without compromising the skin barrier. Night Repair Therapy is a prime example, the outperfoming results came without irritation.
READ THE CLINICAL DATA
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