The Claim
In patients with ST-segment elevation myocardial infarction (STEMI), daily supplementation with 15 mL of grape-derived polyphenol concentrate for 3 months is associated with stable plasma TMAO levels, whereas placebo administration is associated with a significant increase in plasma TMAO levels.
What the research says
Supports is higher
Support is ahead, but a single strong opposing study can change this.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
In patients who have had a specific type of heart attack, taking 15 mL of grape polyphenol concentrate daily for three months is linked to no change in plasma TMAO levels, while those taking a placebo show a measurable increase in plasma TMAO levels.
See the scientific wording
In patients with ST-segment elevation myocardial infarction (STEMI), daily supplementation with 15 mL of grape-derived polyphenol concentrate for 3 months is associated with stable plasma TMAO levels, while placebo recipients experience a significant increase, suggesting polyphenols may modulate microbial metabolism linked to cardiovascular risk.
Grape polyphenols feed beneficial gut bacteria that make butyrate, which tightens the gut lining and crowds out harmful bacteria that produce TMAO. With fewer harmful bacteria and a stronger gut barrier, fewer TMA precursors leak into the blood, so the liver makes less TMAO.
What the research says
1 studyStudy: Polyphenol-mediated microbiome modulation in STEMI patients: a pilot study
In people recovering from a serious heart attack, taking a daily grape supplement kept a harmful blood chemical called TMAO from rising, while those who took a fake pill saw TMAO levels double. This suggests the grape supplement may help protect the heart by changing gut bacteria.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.