Two weeks of betaine, a compound found in beets and sold as TMG, was linked to roughly 16% higher bench throw power on day one of a hard testing block in resistance-trained men. A randomized, double-blind crossover trial also found higher isometric bench press force, with smaller improvements in vertical jump power and isometric squat force. But reps and jump squat power did not budge, and the study included just 12 men. Here's what the data show, the dose used, and what lifters should and shouldn't take from it.
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