Disproportionality analysis of dietary supplement adverse events in the FDA CAERS database, 2004-2025.

Our assessment

This study analyzed 48,840 reports of adverse events tied to dietary supplements submitted to the FDA between 2004 and 2025 FDA FAERS ↗. Researchers used several statistical methods to find safety signals, which are statistical flags indicating a product might be linked to more side effects than expected FDA FAERS ↗. This is a large-scale analysis of real-world data, but a key limitation is that the signals were identified at the product-name level, not the specific ingredient level, meaning the flag points to a specific product brand or name rather than a single vitamin or mineral FDA FAERS ↗.

How it works

What this means for you: The FDA’s CAERS database collects reports of health problems that people or their doctors believe are linked to a supplement. By analyzing tens of thousands of these reports, researchers can spot patterns and identify which products are showing up in reports more often than would be expected by chance. These statistical signals act as an early warning system, alerting regulators and the public to potential safety issues that need further investigation. Because the analysis is at the product-name level, if a signal is found, it doesn't automatically mean the active ingredient is unsafe — it could be related to a specific formulation, contaminant, or batch.

Safety profile

Data not available. The study abstract does not list specific side effects or their report counts. The analysis identified statistical signals at the product-name level, but the full details on which products or side effects were flagged are not provided in this abstract FDA FAERS ↗.

Our recommendation

This research highlights that even products labeled as "dietary supplements" can be associated with adverse events. Because these are statistical flags and not definitive proof of harm for a specific ingredient, the findings underscore the importance of the FDA's post-market surveillance system. For you, this means always reporting any unexpected side effects from a supplement to the FDA via their Safety Reporting Portal. It also reinforces the value of discussing any supplement you take with your healthcare provider, especially if you have pre-existing health conditions or take other medications FDA FAERS ↗.