2.4. Resveratrol Purity and Formulation Analysis
The resveratrol administered to participants was obtained from a compounding pharmacy (Buenos Aires Pharmacy, São Paulo, Brazil). The purity of the product supplied was analyzed by capillary electrophoresis using a Proteome Lab PA800 (Beckman Coulter, Fullerton, CA, USA) at the Laboratory of Capillary Chromatography and Electrophoresis at the Chemistry Institute of the University of São Paulo. Samples of the manipulated capsules and the standards of resveratrol were performed in triplicate, and areas under the peak were compared. The purity of resveratrol was 87 ± 1.1% on average (coefficient of variation: 1.2%).