Abstract. Low serum 25-hydroxyvitamin D [25(OH)D] levels remain a challenge worldwide. While some in vitro studies show a caffeine-induced decrease in vitamin D receptor expression, there is a paucity of research to define the extent of caffeine intake ...
Zusammenfassung. Coffein als Bestandteil zahlreicher Schmerzmittel soll in Kombination mit einem Analgetikum Wirkungen entfalten, die den Missbrauch begünstigen. Als Beitrag zur Klärung dieses Problemkreises wurde nach einem 2-faktoriellen Plan die ...
Abstract In this study the influence of caffeine as an energy-increasing substance on visual information processing was examined. Subjects were presented with a dual-task consisting of two choice reaction time tasks. In addition, one of the tasks was ...
We studied the effect of experimenter expectations and different instructions in a balanced placebo design. 157 subjects were randomized into a 2 × 4 factorial design. Two experimenters were led to expect placebos either to produce physiological effects ...