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    Glossary Global Photographic Assessment

    standardized method to evaluate hair changes using comparative photos

    Global Photographic Assessment (GPA) is a standardized method used to evaluate hair growth and hair loss by comparing photographs taken at different times. This technique allows both patients and healthcare professionals to visually track changes in hair density and scalp coverage, providing a clear and objective measure of treatment effectiveness or disease progression.

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    Research 30 of 1000+

    1. Photographic assessment improves adherence to recommended follow-up in patients with androgenetic alopecia and alopecia areata: A retrospective cohort study Indian Journal of Dermatology, Venereology and Leprology · 2019 · 1 citations
    2. Reproducibility of global photographic assessments of patients with male pattern baldness in a clinical trial with finasteride. Journal of Investigative Dermatology · 1995 · 5 citations
    3. Global photographic assessment of men aged 18 to 60 years with male pattern hair loss receiving finasteride 1 mg or placebo Journal of The American Academy of Dermatology · 2012 · 35 citations
    4. Efficacy and Safety of Oral Minoxidil 5 mg Once Daily in the Treatment of Male Patients with Androgenetic Alopecia: An Open-Label and Global Photographic Assessment Dermatology and therapy · 2020 · 24 citations
    5. Use of an alternative method to evaluate erythema severity in a clinical trial: difference in vehicle response with evaluation of baseline and postdose photographs for effect of oxymetazoline cream 1·0% for persistent erythema of rosacea in a phase IV study British Journal of Dermatology · 2018 · 11 citations
    6. 1040 Photographing alopecia - How many pixels are needed for clinical evaluation? 2019
    7. Assessment of hair loss: clinical relevance of hair growth evaluation methods Clinical and Experimental Dermatology · 2002 · 41 citations
    8. Reliability and Validity of a Photographic Method for Measuring Facial Hair Density in Men Archives of Dermatology · 2011 · 4 citations
    9. A review of ageing and an examination of clinical methods in the assessment of ageing skin. Part 2: Clinical perspectives and clinical methods in the evaluation of ageing skin International Journal of Cosmetic Science · 2008 · 78 citations
    10. A practical guide to the standardization of hair loss photography for clinicians Clinical and Experimental Dermatology · 2024 · 4 citations
    11. Advancing Hair Loss Assessment in Alopecia Areata: The Mathematical Case for Centralised, Standardised Imaging medRxiv · 2026
    12. Imaging Tools for Noninvasive Hair Assessment Cutis · 2023
    13. A pilot study to evaluate effectiveness of botulinum toxin in treatment of androgenetic alopecia in males Journal of Cutaneous and Aesthetic Surgery · 2017 · 24 citations
    14. What is the Efficacy of Finasteride Therapy in Reducing or Reversing Hair Loss 2012
    15. Diffuse unpatterned alopecia: Practical diagnostic considerations Journal of Hair Restoration and Regenerative Medicine · 2026
    16. Objective outcome measures: Collecting meaningful data on alopecia areata Journal of The American Academy of Dermatology · 2017 · 39 citations
    17. Finasteride in the treatment of Japanese men with male pattern hair loss. PubMed · 2004 · 12 citations
    18. Progression of hair loss in men with androgenetic alopecia (male pattern hair loss): long-term (5-year) controlled observational data in placebo-treated patients. 2008 · 9 citations
    19. Journal Review: Long-term (5-year) multinational experience with finasteride 1mg in the treatment of men with androgenetic alopecia Hair transplant forum international · 2002 · 7 citations
    20. Faculty Opinions recommendation of The effect of autologous activated platelet rich plasma (AA-PRP) injection on pattern hair loss: clinical and histomorphometric evaluation. Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature · 2014
    21. 5 mg/day finasteride treatment for normoandrogenic Asian women with female pattern hair loss Journal of The European Academy of Dermatology and Venereology · 2010 · 64 citations
    22. The efficacy and safety of dutasteride compared with finasteride in treating men with androgenetic alopecia: a systematic review and meta-analysis Clinical Interventions in Aging · 2019 · 38 citations
    23. Effects of Finasteride (1 mg) on Hair Transplant Dermatologic Surgery · 2006 · 30 citations
    24. Effects of Finasteride (1 mg) on Hair Transplant Dermatologic Surgery · 2005 · 23 citations
    25. Efficacy and tolerability of finasteride 1 mg in men aged 41 to 60 years with male pattern hair loss. PubMed · 2003 · 22 citations
    26. The effectiveness of combination therapies for androgenetic alopecia: A systematic review and meta‐analysis Dermatologic Therapy · 2020 · 11 citations
    27. Efficacy and safety of 3% minoxidil versus combined 3% minoxidil / 0.1% finasteride in male pattern hair loss: a randomized, double-blind, comparative study. PubMed · 2012 · 6 citations
    28. Minoxidil dose response study in female pattern hair loss patients determined to be non-responders to 5% topical minoxidil. PubMed · 2017 · 4 citations
    29. Low-level Laser Therapy with Novel Array of Light Source and Individualized Program for Treatment of Androgenetic Alopecia: A 16-week, Randomized, Double-blind, Sham Device-controlled Study Medical lasers · 2020 · 1 citations
    30. 841 Minoxidil dose response study in female pattern hair loss patients determined to be non-responders to 5% topical Minoxidil Journal of Investigative Dermatology · 2017 · 1 citations