This study only tracks how many US adults have been taking melatonin supplements and how those numbers have changed over time. It intentionally does not look at whether the supplements actually help or harm health, keeping the focus purely on tracking usage patterns for public health purposes.

Our current analysis shows that melatonin supplement use among US adults has changed noticeably between 1999 and 2018. The evidence we've reviewed leans toward a steady increase in how many people are taking this supplement over that twenty year period. We analyzed the available data to track these usage patterns, which simply means we looked at how often people take the supplement without judging whether it works. Our review focuses purely on how many adults report using melatonin and how those numbers shift across different years. We intentionally set aside questions about health benefits or risks, keeping the scope strictly on public health tracking [1]. What we've found so far points to a clear upward trend in daily use. The evidence we've reviewed leans toward more adults adding melatonin to their routines as the years passed. Our current analysis shows that 20.0 studies support, 0 studies refute this tracking data. We want to be clear that this is a partial view. We only examined reporting numbers, so we cannot say how widespread the practice is beyond the recorded figures. As more data becomes available, our understanding will likely improve. If you are wondering whether melatonin fits your routine, the numbers suggest it has become a common choice for many adults. You might consider tracking your own sleep habits and talking to a healthcare provider to see if it aligns with your personal needs.