The Claim

Melatonin supplementation improves cardiac function and attenuates adverse ventricular remodeling in heart failure models by reducing myocardial fibrosis, decreasing cardiomyocyte apoptosis, modulating extracellular matrix turnover, normalizing circadian blood pressure, enhancing Na+/K+ ATPase and SERCA2a activity, and activating PI3K/AKT/mTOR and AMPK signaling pathways, ultimately resulting in improved ejection fraction and reduced cardiac cachexia.

Source: Evidence for the Benefits of Melatonin in Cardiovascular Disease

What the research says

Roughly balanced

Support and challenge are close. The picture may shift as more studies come in.

Supports
1score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

How it works
1 study reviewed
In plain English

Taking melatonin supplements may help the heart pump better and prevent damage in people with heart failure. It works by slowing down scar tissue buildup, protecting heart cells from dying, and helping the heart regulate blood pressure and energy use more efficiently. This could lead to stronger heart contractions and less muscle wasting.

See the scientific wording

Melatonin supplementation improves cardiac function and attenuates adverse ventricular remodeling in heart failure models by reducing myocardial fibrosis, decreasing cardiomyocyte apoptosis, and modulating extracellular matrix turnover. It normalizes circadian blood pressure patterns, enhances Na+/K+ ATPase and SERCA2a activity, and activates anabolic signaling pathways including PI3K/AKT/mTOR and AMPK, ultimately improving ejection fraction and reducing cardiac cachexia.

What the research says

1 study

  1. Study: Evidence for the Benefits of Melatonin in Cardiovascular Disease

    The review synthesizes animal studies showing reduced fibrosis, improved SERCA2a/Na-K ATPase function, and activation of survival pathways (PI3K/AKT, AMPK). It also cites human clinical data showing improved LVEF and endothelial function in HFrEF patients, supporting a beneficial causal relationship in these contexts.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.