Rehydration and low ABV beer

A trial of seven healthy male volunteers, were asked to consume either light beer (2% ABV) or regular beer (4% ABV) both with and without the addition of 25mM sodium, following exercise on a stationary bike.  This trial was repeated four times and all volunteers received all four beverages.

The volunteers were then asked to measure their urine output and body mass changes following rehydration.  The results showed that the light beer allowed significantly more rehydration to occur than the regular beer.  Adding sodium to the light beer seemed to further improve its rehydration effects but interestingly, had no obvious effect in the regular beer.


  1. B Desbrow International Journal of Sport Nutrition & Exercise: The rehydration potential of low alcohol beers