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    Glossary Placebo Group

    group receiving an inactive substance to compare treatment effects

    A Placebo Group is a set of participants in a clinical trial who receive a placebo—a substance with no therapeutic effect, often a sugar pill—rather than the active treatment being tested. This group serves as a baseline to compare the effects of the actual treatment, helping researchers determine whether the treatment's effects are due to the treatment itself or other factors. This is also known as a Control Group in many studies.

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    Research 30 of 1000+

    1. The Effects of Lower vs Higher Cell Number of Platelet-Rich Plasma (PRP) on Hair Density and Diameter in Androgenetic Alopecia (AGA): A Randomized, Double-Blinded, Placebo, Parallel-Group Half-Scalp IRB-Approved Study. Aesthetic Surgery Journal · 2021 · 6 citations
    2. A randomized, placebo- and active-controlled, parallel-group, multicenter, investigator-blinded study of four treatment regimens of posaconazole in adults with toenail onychomycosis Journal of The American Academy of Dermatology · 2010
    3. Efficacy and safety of oral spironolactone for female pattern hair loss in premenopausal women: a randomized, double-blind, placebo-controlled, parallel-group pilot study International Journal of Women’s Dermatology · 2025
    4. Efficacy and Safety of Low-Dose (0.2 mg) Dutasteride for Male Androgenic Alopecia: A Multicenter, Randomized, Double-Blind, Placebo-Controlled, Parallel-Group Phase III Clinical Trial Annals of Dermatology · 2025
    5. Efficacy of Quadruple-coated Probiotics in Patients With Irritable Bowel Syndrome: A Randomized, Double-blind, Placebo-controlled, Parallel-group Study Journal of neurogastroenterology and motility · 2024
    6. Effect of applying <i>Lactiplantibacillus plantarum</i> subsp. <i>plantarum</i> N793 to the scalps of men and women with thinning hair: a randomized, double-blind, placebo-controlled, parallel-group study BMFH · 2024
    7. Correction to: The Effects of Lower vs Higher Cell Number of Platelet-Rich Plasma (PRP) on Hair Density and Diameter in Androgenetic Alopecia (AGA): A Randomized, Double-Blinded, Placebo, Parallel-Group Half-Scalp IRB-Approved Study Aesthetic Surgery Journal · 2022 · 1 citations
    8. 724 - A phase 2b, randomized, double-blinded, parallel-group, placebo-controlled study to evaluate the efficacy and safety of rezpegaldesleukin in adults with severe to very-severe alopecia areata British Journal of Dermatology · 2024
    9. Commentary on: The Effects of Lower vs Higher Cell Number of Platelet-Rich Plasma (PRP) in Hair Density and Diameter in Androgenetic Alopecia (AGA): A Randomized, Double-Blinded, Placebo, Parallel-Group Half-Scalp IRB Study Aesthetic Surgery Journal · 2021
    10. Craniometric Ancestry Proportions among Groups Considered Hispanic: Genetic Biological Variation, Sex-Biased Asymmetry, and Forensic Applications Journal of the American Academy of Dermatology · 2014 · 2 citations
    11. Topical minoxidil in early male pattern baldness Journal of The American Academy of Dermatology · 1985 · 138 citations
    12. Psychological Characteristics of Men With Alopecia Androgenetica and Effects of Treatment With Topical Minoxidil An Exploratory Study International Journal of Dermatology · 1988 · 17 citations
    13. Validation of scalp coverage scoring methods for scalp hair loss in male pattern hair loss (androgenetic alopecia) Skin Research and Technology · 2006 · 5 citations
    14. The Reduction of Male Lower Urinary Tract Symptoms Is Associated With a Decreased Risk of Death 2023 · 1 citations
    15. Evaluation of efficacy of <i>Silybum marianum</i> flower extract on the mitigating hair loss in vitro and in vivo Journal of cosmetic dermatology · 2023 · 1 citations
    16. Comparison between dutasteride and finasteride in hair regrowth and reversal of miniaturization in male and female androgenetic alopecia: a systematic review Dermatology reports · 2024
    17. GREEN TEA EXTRACT IN AN EYELASH GROWTH ENHANCER GEL FORMULATION: STABILITY TEST, EYE IRRITATION TEST, AND HUMAN EYELASH GROWTH ACTIVITY Asian journal of pharmaceutical and clinical research · 2017
    18. Effect of the frequency of injection on the clinical responses of postmenopausal women to testosterone enanthate with estradiol valerate American journal of obstetrics and gynecology · 1963
    19. The effect of placebo in split‐scalp and whole‐head platelet‐rich plasma trials for androgenetic alopecia differs: Findings from a systematic review with quantitative evidence syntheses Journal of Cosmetic Dermatology · 2022
    20. Placebo-controlled oral pulse prednisolone therapy in alopecia areata Journal of the American Academy of Dermatology · 2005 · 141 citations
    21. Multicenter double blind randomized placebo controlled clinical trial of minoxidil gel in the treatment of alopecia areata The Chinese Journal of Clinical Pharmacology · 2006
    22. Treatment of refractory hematospermia with Finasteride: A prospective placebo-controlled study Bangladesh journal of urology · 2023
    23. Efficacy and safety of topical GT20029 in male patients with androgenetic alopecia: a multicenter, randomized, double-blind, placebo-controlled phase 2 study 2025
    24. A randomized, double blind, placebo controlled, split patch study to evaluate the effects of platelet rich plasma on alopecia areata International Journal of Research in Medical Sciences · 2018
    25. Efficacy of Postbiotics in a PRP-Like Cosmetic Product for the Treatment of Alopecia Area Celsi: A Randomized Double-Blinded Parallel-Group Study Dermatology and Therapy · 2020 · 17 citations
    26. 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
    27. Rationale and Design of a Novel, Phase 3, External and Synthetic Placebo-Controlled Clinical Trial of Ritlecitinib 50 mg and 100 mg for Alopecia Areata Dermatology and Therapy · 2025
    28. Blood pressure changes in patients after Minoxidil microinfusion to treat female pattern alopecia: analysis of a randomized, single blinded, placebo controlled clinical trial Archives of Dermatological Research · 2025 · 1 citations
    29. Latanoprost and minoxidil: Comparative double-blind, placebo-controlled study for the treatment of hair loss Surgical and Cosmetic Dermatology · 2018
    30. Effects of finasteride in patients with inflammatory chronic pelvic pain syndrome: a double-blind, placebo-controlled, pilot study Urology · 1999 · 65 citations