Scientific references:
Maares, M., & Haase, H. (2021). Role of zinc in the regulation of muscle metabolism and functional recovery after exercise: A review. Nutrients, 13(3), 745.
Newhouse, I. J., & Finstad, E. W. (2000). Magnesium and exercise: An update. Sports Medicine, 36(10), 867-893. Veronese, N., Berton, L., Carraro, S., Bolzetta, F., De Rui, M., Perissinotto, E., ... & Sergi, G. (2014). Effect of magnesium supplementation on muscle fitness: A meta-analysis. Magnesium Research, 27(3), 84-91.
Leklem, J. E. (2006). Vitamin B6 in exercise and sports. International Journal of Sport Nutrition and Exercise Metabolism, 16(3), 342-357.
Manore, M. M., & Leklem, J. E. (1981). Effect of vitamin B6 deficiency on exercise performance. Journal of Applied Physiology, 51(1), 68-72.
Cavagnini, F., Invitti, C., Pinto, M., Dubini, A., Marelli, A., & Pagani, G. (1980). Effect of acute and repeated administration of gamma-aminobutyric acid (GABA) on growth hormone and prolactin secretion in man. Acta Endocrinologica, 93(2), 149-154. Powers, M. E., Yarrow, J. F., McCoy, S. C., & Borst, S. E. (2008). Growth hormone isoform responses to GABA ingestion at rest and after exercise. Medicine and Science in Sports and Exercise, 40(1), 104-110.