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Acute water supplementation has shown to improve cognitive abilities in young adults and school children predominantly in visual attention and short term memory. This study aimed to replicate and expand on previous findings reported in young adults. Participants (N = 30; mean age = 23.4 SD = 5.6) attended three experimental sessions. Each session consisted of baseline measures of mood and cognitive performance, followed by a counterbalanced intervention period of either no water, 500 mL non-chilled or chilled water. Twenty minutes after water consumption, the mood questionnaires and cognitive tasks were repeated. Our results showed that individuals reported feeling more attentive and less fatigued after water consumption compared with the no water condition. No significant changes in cognitive performance were found due to water intervention. These results corroborate previous water …