The influence of ethanol containing cosmetics on ethyl glucuronide concentration in hair

Ethyl glucuronide (EtG) and fatty acid ethyl esters (FAEE), non-volatile, direct metabolites of ethanol have been shown to be suitable markers for the evaluation of social and chronic excessive alcohol consumption. Previous investigations have shown that the regular use of hair-care products with high alcohol content lead to an increase of FAEE concentration and consequently gave false-positive results for the determination of FAEE in hair. In this study we investigated the influence of a long-term hair treatment with EtOH containing lotion, on the EtG concentrations in hair. In this study 7 volunteer subjects (classified as either rare, social or heavy drinkers) treated the right side of their scalp every day during a one or two month period with a commercial hair tonic (Seborin), which contains 44.0% ethanol (vol%). Collection of hair specimens from both sides of the scalp was done one day before hair treatment, one week and one month after treatment (for 5 subjects also after two months of treatment). A hair segment of 3 centimeters (cm) was cut and then washed with water and acetone, and then pulverized. EtG was quantified by GC/MS after pulverization and 2h of ultrasonication in water, extraction by solid phase extraction using Oasis MAX columns and derivatization with HFBA. Measurements were done in negative chemical ionization mode using EtG-D5 as internal standard. Comparison of EtG concentration in the treated and in the non-treated hair specimens did not show any increase at the different dates of collection for the 7 subjects. In conclusion, these results show that there is no indication for an increase of EtG after use of ethanol containing hair cosmetics.     

Book Reviews

Books reviewed in this issue. Carlos Eduardo Poggio Teixeira, Brazil, the United States, and the South American Subsystem: Regional Politics and the Absent Empire. Lanham: Lexington Books, 2014. Abbreviations, bibliography, index, 169 pp.; hardcover $80, paperback $36.99, ebook $22.07. Matthew E. Carnes, Continuity Despite Change: The Politics of Labor Regulation in Latin America. Stanford: Stanford University Press, 2014. Tables, figures, bibliography, index, 256 pp.; hardcover $65. Tasha Fairfield, Private Wealth and Public Revenue in Latin America: Business Power and Tax Politics. New York: Cambridge University Press, 2015. Figures, tables, acronyms, appendixes, bibliography, index, 364 pp.; hardcover $99, ebook $79. Eduardo Moncada, Cities, Business, and the Politics of Urban Violence in Latin America. Stanford: Stanford University Press, 2016. Bibliography, index, 248 pp.; hardcover $65, ebook. Teri L. Caraway, María Lorena Cook, and Stephen Crowley, eds., Working Through the Past: Labor and Authoritarian Legacies in Comparative Perspective. Ithaca: Cornell University Press, 2015. Photographs, illustrations, notes, bibliography, index, 296 pp.; hardcover $79.95, paperback $27.95. Elin Skaar, Camila Gianella Malca, and Trine Eide, After Violence: Transitional Justice, Peace, and Democracy. New York: Routledge, 2015. Figures, tables, index, 232 pp.; hardcover $145, paperback $54. David A. Steinberg, Demanding Devaluation: Exchange Rate Politics in the Developing World. Ithaca: Cornell University Press, 2015. Illustrations, figures, tables, appendix, notes, bibliography, index, 288 pp.; hardcover $45. UN Women, Progress of the World's Women 2015–16: Transforming Economies, Realizing Rights. New York: United Nations, 2015. Figures, tables, maps, notes, index, bibliography, 342 pp.; web version, http://progress.unwomen.org/en/2015     

Buy Today,Pay Tomorrow: Formal Credit Supply and Domestic Electrical and Electronic Goods Consumption in São Paulo's Urban Periphery

Since the beginning of the twenty-first century, expansion of the formal credit supply in Brazil has promoted the ‘financial inclusion’ of the low-income population, especially through instalment plans offered by large retail chains. This article aims to analyse the impacts of formal credit availability on the consumption of electrical and electronic goods by residents of Jardim Helena, a neighbourhood in São Paulo's periphery. Through the collection and analysis of qualitative and quantitative data, this study reveals how the instalment plan can stimulate consumption among the low-income population, with a significant impact on household budgets, raising the risk of indebtedness.