Recent Posts

Coffee, caffeine and health

Expert comment by Dr Astrid Nehlig In January, the European Food Safety Authority published its anticipated draft scientific opinion on the use of health claims relating to caffeine. Drawing on the available body of scientific research, it was concluded that single doses of caffeine up to 200mg and daily intakes of up to 400mg do […]

A discussion on coffee consumption and dehydration

A guest post by Dr Sophie Killer There has been a lot of uncertainty over the role of coffee and other caffeinated beverages in hydration. Due to early research showing the short term effect of pure caffeine as a mild dehydrating agent, there appears to be a common assumption that caffeinated beverages, such as coffee, […]

Caffeine and fluid balance during exercise

A review of 10 studies, which scrutinised the different protocols and the results obtained, concluded: –     A daily intake of 300mg of caffeine induces only a mild, short-term diuretic effect, similar to that of water, with no significant effect on overall fluid balance. –    There is no evidence that caffeine is detrimental […]

Coffee, caffeine & hydration in the general population – Part 2

Caffeinated beverages and fluid intake A Beverage Guidance Panel, the initiative of a group of scientists, was set up in US, with the objective of systematically reviewing the literature7 on beverages, and providing guidance to consumers. As far as caffeinated beverages are concerned, the Panel states that caffeine consumption of up to 500mg/day (the equivalent […]

Coffee, caffeine & hydration in the general population – Part 1

Caffeinated beverages and urinary excretion In a study, which investigated the effect of coffee drinking on urine excretion, it was revealed that those who drank coffee saw a significant increase in the volume of urine excreted, compared to those who drank the same volume of water. When participants were given six cups of coffee (642mg […]