... some of these factors, the effects of ATD, specifically on word learning, has recentlybeen examined in a mega-analysis of data froma number of studies, including our own, in order toexamine ... reduction in the scores in femaleshaving the higher dose. Our finding of a gender-specific effect is in keeping with previous studiessuggesting greater vulnerability to behavioural effects of ATD in ... strengthcontained an additional 2.3 g of L-TRP. The com-position of the 100 g drink as described by Young(14) w as:L-alanine 5.5 g, L-arginine 4.9 g, L-cysteine2.7 g,L-glyine 3.2 g, L-histidine 3.2...