A recent study of more than 130,000 adults found that people prescribed melatonin long-term had significantly higher rates of heart failure and mortality. Headlines quickly followed, raising concerns about the safety of one of the most widely used sleep supplements.

But what does the study actually show?

In this episode of LSAT Logic Applied, Andrew Leahey uses the tools of LSAT logical reasoning to examine the claim. We break down common analytical pitfalls including selection bias, contaminated control groups, reverse causation, relative versus absolute risk, and hidden confounding variables.

The goal isn’t to give medical advice—it’s to show how the reasoning behind high-profile health claims can be evaluated using the same logic principles tested on the LSAT.

If you’ve ever wondered how correlation studies can mislead—even when the numbers sound alarming—this episode walks through the argument step by step.

Because good reasoning isn’t just for test day.