Examination of Beer Under the Aspect of its Eligibility as a Fitness Drink
K. Krennhuber, P. Kuttner, A. Jäger - Examination of Beer Under the Aspect of its Eligibility as a Fitness Drink - International Journal of Food and Biosystems Engineering, Vol. 1, No. 1, 2016, pp. 67-73
During longer physical strainsour body loses water and salts by sweating.
This deprivation leads to states of exhaustion and convulsions. A fitness drink
should replenish both, water and mineral nutrients (mainly sodium). Different
beers, alcoholic, alcohol-free and yeast-clouded, alcohol-free beer were analyzed
by HPLC and Ion chromatography to determine the content of mineral salts
and carbohydrates. Osmolality as a degree of tonicity was calculated based on
the dissolved components. Data was compared to three fitness drinks declared
as mineral nutrient containing and isotonic. Subsequently, different sodium
salts were added to alcohol-free, yeast-clouded beer to reach the recommended
sodium concentrations of 500 mg L1. These spiked beers were blind tested
for flavor impairments. This study shows that just two of the fitness drinks
came even close to fulfilling the EU direction. Generally, almost all beers are
mineral nutrient containing, as defined by Austrian law. Due to the alcohol
concentration none of alcoholic beers are isotonic, as they are hypertonic.Most
of the yeast clouded, alcohol free beers are within the isotonic range. Each beer
fulfills the EU recommended carbohydrate content but none comes even close to
fulfilling the sodium content.The blind tasting of the spiked beers showed minor
flavor impairment with sodium carbonate causing the least negative effects on
taste and odor. In conclusion, yeast clouded, alcohol-free beer might be labeled
as mineral nutrient containing and isotonic, implying to be an ideal sport drink.
Due to the lack of sodium the real benefit of such a beverage could diminish unless
mixed with beverages containing high levels of sodium or sodium carbonate.