Betaine supplementation improves CrossFit performance and increases testosterone levels, but has no influence on Wingate power: randomized crossover trial.
Emilia E ZawiejaKrzysztof Durkalec-MichalskiMarcin SadowskiNatalia GłówkaAgata U ChmurzyńskaPublished in: Journal of the International Society of Sports Nutrition (2023)
genotypes. The trial was registered on clinicaltrials.gov (NCT03702205) on 10 October 2018.