Short-term Annatto Carotenoids Supplementation Effect on LDL Susceptibility to Ex-vivo Oxidation and Oxidative Stress Biomarkers in Healthy Individuals

Graduate and post-graduate students were recruited in Federal University of Santa Maria to study participation. First, the health status of volunteers was analysed by questioner application (to evaluate lifestyle, family history, individual characteristics), anthropometric (height, weight, waist circumference) and biochemical parameters (glucose, lipid profile, transaminases, urea, creatinine) measurements. According to inclusion criteria, 18 volunteers were able to study participation, but just 16 people remained until the end of the study.

Each treatment was composed by 7 capsules (containing 0.05 mg carotenoid or placebo/kg b.w.) which should be consumed once a day (preferably in the morning), during 7 days. It was conducted a randomized, double blind, placebo-controlled crossover clinical trial, where 16 participants received 4 proposed treatments (bixin, norbixin, lycopene and placebo) in different periods. To plasma, serum and red blood cells (RBC) obtainment, 2 fasting blood collections were made, in the beginning (Day 0) and the end (Day 7) of each treatment. These samples were used for evaluating the ex vivo oxidation of LDL induced by copper sulphate and biochemical and oxidative biomarkers measurements.