https://www.selleckchem.com/pr....oducts/adenosine-dis
experimental conditions (training workload, diet and sun exposure) of the present study. In professional soccer players it was found a positive relationship between vitamin D and testosterone in summer and between reactive oxygen species and cortisol in winter. However the question whether such results are genuine cause-effect relationships or mere casual or spurious statistical correlations is still unsolved. As matter of fact, such results could be dependent from other determinants which might drive the aforeme