The Claim

Testosterone-replacement therapy has no statistically significant effect on the risk of myocardial infarction in middle-aged and older men with low testosterone after at least 12 months of treatment, with a relative risk of 0.94 (95% CI 0.69–1.28).

Source: Long-Term Cardiovascular Safety of Testosterone-Replacement Therapy in Middle-Aged and Older Men: A Meta-analysis of Randomized Controlled Trials

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
45score
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.

Quantitative
1 study reviewed
In plain English

In middle-aged and older men with low testosterone, testosterone-replacement therapy does not change the risk of heart attack compared to placebo after 12 months of treatment.

See the scientific wording

Testosterone-replacement therapy does not significantly affect the risk of myocardial infarction in middle-aged and older men with low testosterone, with a relative risk of 0.94 (95% CI 0.69–1.28), indicating no statistically significant benefit or harm compared to placebo after at least 12 months of treatment.

Why this might work

Adding testosterone back into the body does not change how blood vessels form plaques or how clots form in the heart arteries, so the chance of a heart attack stays the same.

Supported mechanismbased on 1 study

What the research says

1 study
  1. Study: Long-Term Cardiovascular Safety of Testosterone-Replacement Therapy in Middle-Aged and Older Men: A Meta-analysis of Randomized Controlled Trials

    In older men with low testosterone, taking testosterone therapy doesn't seem to make heart attacks more or less likely, based on a big review of 23 studies. The numbers show no clear increase or decrease in heart attacks.

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.