Search Results for "Psychopharmacology"
David Schairer BA, Laura Schairer BA, Adam Friedman MD| |
The Infatuation With Biotin Supplementation: Is There Truth Behind Its Rising Popularity? A Comparative Analysis of Clinical Efficacy versus Social Popularity
Teo Soleymani MD, Kristen Lo Sicco MD, and Jerry Shapiro MD FAAD FRCPC| |
Biotin, also known as Vitamin B7 or vitamin H, is a water-soluble B vitamin that acts as an essential cofactor for several carboxylases involved in the cellular metabolism of fatty acids, amino acids, and gluconeogenesis. Although there exists an incredible amount of social media hype and market advertising touting its efficacy for the improvement of hair quantity and quality, biotin’s efficacy for hair remains largely unsubstantiated in scientific literature. We reviewed all pertinent scientific literature regarding the efficacy of biotin supplementation for hair growth and quality improvement, and we also investigated its popularity in society defined as a function of market analytics. To date, there have been no clinical trials conducted to investigate the efficacy of biotin supplementation for the treatment of alopecia of any kind, nor has there been any randomized controlled trial to study its effect on hair quality and quantity in human subjects. Because of the lack of clinical evidence, its use to improve hair quantity or quality is not routinely recommended. However, societal infatuation with biotin supplementation is not only propagated by its glamorization in popular media, its popularity is vastly disproportionate to the insufficient clinical evidence supporting it’s efficacy in hair improvement. In other words, biotin supplements are quite “in vogue”, without there being any real reason to be so.
J Drugs Dermatol. 2017;16(5):496-500.
Validation of a New Patient-Reported Outcome Measure for Facial Acne: The Acne Symptom and Impact Scale (ASIS)
Stacie Hudgens MA,a* Julie C. Harper MD,b Selena R. Daniels MS,c Benjamin Banderas,d Sepideh Varon,c and Andrew F. Alexis MD MPHf| |
METHODS: Psychometric evaluation was performed using both traditional psychometrics in line with proposed US Food and Drug Administration (FDA) criteria and new psychometric methods, Rasch Measurement Theory (RMT). Assessment of equivalence was also evaluated between Caucasians and Non-Caucasians on individual items.
RESULTS: One-hundred fifty subjects completed baseline and follow-up assessments (89 [59.33%] in the Caucasian group and 61 [40.67%] in the Non-Caucasian group). Psychometric analyses demonstrated that the ASIS Sign and Impact domains both performed well. Each domain fulfilled traditional psychometric criteria (Cronbach’s alpha=0.79-0.92; test-retest reliability=0.75-0.78) and mostly satisfied Rasch psychometric criteria (person-reliability=0.72-0.93; person-separation=1.61-3.69). Select individual ASIS Items also performed well across all measures and were shown to be reliable and valid as stand-alone items. A similar pattern of results were found for both Caucasian and Non-Caucasian racial subgroups.
CONCLUSIONS: These findings provide empirical evidence that the ASIS is a reliable and valid PRO measure that can accurately assess the severity of symptoms and impacts associated with acne vulgaris.
J Drugs Dermatol. 2015;14(6):552-559.
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