A descriptive analysis of ingredients of pre-workout supplements available in brazilian virtual shops
Abstract
Introduction: A category of supplements called "pre-workout", comprises products formulated by a mixture of ingredients for the purpose of reducing fatigue and improving sports performance. Objective: To evaluate the constituent ingredients of existing formulations and to establish an objective definition of the product. Materials and Methods: We searched ten websites of food supplements were searched on an online search platform, followed by the selection of all pre-workout products, excluding repeat products. Subsequently, a detailed analysis of each product was made regarding the manufacturer and its labeling. Results: A total of 121 supplements were found, distributed in 74 different manufacturers. The main ingredients found were Caffeine, in 72.73% of the labels (n = 88), Taurine, 57.02% (n=69), Inositol, 28,10% (n=34), Glucononolactone, Arginine, 25.62% (n=31), Beta Alanine, 24.80% (n=30), Citrulline, 9.09 (n=33), Creatine % (n=11), Glycerol, 7.44% each (n=9), and Glutamine present in 6.61% of the sample (n=8). Discussion: There is a large amount and variety in the composition of products with pre-workout designation, perhaps motivated by the great interest and consumption of dietary supplements by physical exercise practitioners and athletes. Although there are some data that indicate benefits of using these products, they are scarce and inconclusive, so their safety is still questioned. In addition Brazil lacks a standardization or regulation for the trade of these products. Conclusion: It is possible to define then as a mixture of ingredients, in varied formulations, whose purpose is the improvement of the sporting performance soon after its consumption.
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