16 citations
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June 2017 in “PLoS ONE” This small study reports that a 6-group geometric classification method is more reliable for classifying human hair curl, although a digital system could further reduce errors.
36 citations
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December 2016 in “Journal of The American Academy of Dermatology” In this study, researchers evaluated the hair pull test and found that normal values should be reduced to two hairs or fewer, with no significant impact from hair washing, brushing, or lifestyle factors such as hair texture and medication use.
193 citations
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January 2015 in “International journal of trichology” This review examines hair cosmetics, including shampoos and conditioners, for their formulations and effects, but reports no new clinical findings; it emphasizes the importance of dermatologist knowledge in treating diverse hair conditions.
55 citations
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March 2007 in “Journal of cosmetic dermatology” This review discusses the historical development of hair straightening products for Afro-ethnic hair and reports no new research findings.