2.5/5
Weak
evidence
Performance evidence brief
Betaine
May modestly improve some strength or jump outcomes, but evidence is not broad enough for a flagship recommendation.
Headline Finding
Recent meta-analysis suggests modest performance signals, but results are outcome-specific and inconsistent.
Dose Context
Chronic studies commonly use gram-level daily dosing for at least one week; acute effects are less established.
Important Caveat
Watch homocysteine and lipid-context claims separately from gym-performance claims.
Source Drawer
Linked Research
- Meta-analysis 2024 performance meta-analysis
- Systematic review Endurance systematic review
- Trial Strength/power trial
- Trial Soccer RCT
- Review Performance/body composition review
How To Read This Rating
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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