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Open AccessArticle

Common Ingredient Profiles of Multi-Ingredient Pre-Workout Supplements

1
Human Performance Lab, Sports Medicine, Mayo Clinic Health System, Onalaska, WI 54650, USA
2
Exercise & Performance Nutrition Laboratory, Lindenwood University, St. Charles, MO 63301, USA
3
Kinesiology and Physical Education, Northern Illinois University, DeKalb, IL 60115, USA
*
Author to whom correspondence should be addressed.
Nutrients 2019, 11(2), 254; https://doi.org/10.3390/nu11020254
Received: 2 January 2019 / Revised: 16 January 2019 / Accepted: 21 January 2019 / Published: 24 January 2019
Multi-ingredient pre-workout supplements are a popular class of dietary supplements which are purported to improve exercise performance. However, the composition of these products varies substantially between formulations, thus making comparisons challenging. Therefore, the purpose of this study was to identify a common ingredient profile of top-selling pre-workout supplements and to compare ingredient dosages to established efficacious values. The top 100 commercially available pre-workout products were analyzed for listed ingredients and amounts, if available, from the supplement facts panel. The mean ± SD number of ingredients per supplement (n = 100) was 18.4 ± 9.7 with 8.1 ± 9.9 of these ingredients included in a proprietary blend at undisclosed quantities. Relative prevalence and average amounts of the top ingredients amounted to: Beta-alanine (87%; 2.0 ± 0.8 g), Caffeine (86%; 254.0 ± 79.5 mg), Citrulline (71%; 4.0 ± 2.5 g), Tyrosine (63%; 348.0 ± 305.7 mg), Taurine (51%; 1.3 ± 0.6 g), and Creatine (49%; 2.1 ± 1.0 g). Nearly half (44.3%) of all ingredients were included as part of a proprietary blend with undisclosed amounts of each ingredient. The average amount of beta-alanine per serving size was below the recommended efficacious dose. The average caffeine content was near the low end for an effective relative dose for a 70 kg individual (3–6 mg·kg−1 of bodyweight). View Full-Text
Keywords: ergogenic aid; supplement; pre-workout; beta-alanine; caffeine; citrulline; creatine; strength; power; energy ergogenic aid; supplement; pre-workout; beta-alanine; caffeine; citrulline; creatine; strength; power; energy
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Jagim, A.R.; Harty, P.S.; Camic, C.L. Common Ingredient Profiles of Multi-Ingredient Pre-Workout Supplements. Nutrients 2019, 11, 254.

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