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Betaine supplementation modulates betaine concentration by methylenetetrahydrofolate reductase genotype, but has no effect on amino acid profile in healthy active males: A randomized placebo-controlled cross-over study

2024, Zawieja, Emilia, Drabińska, Natalia, Jeleń, Henryk, Szwengiel, Artur, Durkalec-Michalski, Krzysztof, Chmurzyńska, Agata

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Betaine supplementation improves CrossFit performance and increases testosterone levels, but has no influence on Wingate power: randomized crossover trial

2023, Zawieja, Emilia, Durkalec-Michalski, Krzysztof, Sadowski, Marcin, Główka, Natalia, Chmurzyńska, Agata