Performance evidence brief
Betaine, also called trimethylglycine, is a compound involved in methylation and osmolyte balance. It is commonly promoted for power, body composition, hydration, and endurance support.
May modestly improve some strength or jump outcomes, but evidence is not broad enough for a flagship recommendation.
Recent meta-analysis suggests modest performance signals, but results are outcome-specific and inconsistent.
Chronic studies commonly use gram-level daily dosing for at least one week; acute effects are less established.
Watch homocysteine and lipid-context claims separately from strength or power claims.
Source Drawer
The score reflects evidence that the supplement does its stated job. Some jobs are direct, such as strength, endurance, or recovery; others are indirect, such as sleep, mood, appetite, or health support. A real effect can still receive a cautious practical rating when dose, safety, product quality, or audience fit remain uncertain.
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