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The goal of this cross-sectional study was to examine the occurrence of bisphenol A (BPA) in the morning spot urine taken from 145 female volunteers of various ages. Total urine BPA concentration was detected in 38.6% samples in the 0.92–70.96 μg/g Cr range. The majority of BPA + women belonged to the 25 + body mass index (BMI) group (54.5% were overweight and 43.4% were obese women). Occurrence of BPA in the urine samples was higher at 40 + ages. The maximum BPA concentration of 70.96 μg/g Cr was detected in the urine sample of an obese woman. It is known that BPA is highly toxic in vitro . In this study BPA impaired significantly the growth of all investigated cell lines, i.e. the EC 50 values were reached at very low concentrations, in the range from 3.24 to 34.85 μg/mL. The obtained in vivo results suggest that a higher exposure to BPA could contribute to weight problems in women and the absence of the BPA in vitro selective toxicity studies indicates to its general toxic mode of action and raises awareness of the health risks associated with its ubiquitous presence in the environment. [ABSTRACT FROM AUTHOR]