Spice warning: Study reveals how a sweet sprinkle of cinnamon could sabotage your medications

Cinnamon — the comforting spice that flavors everything from lattes to baked goods — is now under the scanner for an unexpected reason. Scientists at the University of Mississippi have found that cinnamon’s primary compound, cinnamaldehyde, could interfere with the way your body processes prescription drugs. The findings suggest that, while the occasional sprinkle might seem harmless, high doses could endanger your health.

When a Favorite Flavor Turns Risky
As per a report from the New York Post, at the heart of the concern is cinnamaldehyde’s ability to activate receptors that speed up the breakdown of certain medications. This can make important drugs clear out of the body faster than intended, weakening their effects. According to Shabana Khan, principal scientist involved in the study, "Overconsumption of supplements could lead to a rapid clearance of the prescription medicine from the body, and that could result in making the medicine less effective."

In other words, that heavy-handed shake of cinnamon — particularly if taken as a supplement — might be quietly working against your doctor's prescriptions.

Not All Cinnamon Is Created Equal
Interestingly, not every form of cinnamon poses the same threat. The research points to cinnamon oil, used in flavorings and toiletries, as relatively harmless. The real issue lies with cinnamon bark — especially Cassia cinnamon, the inexpensive variety from southern China commonly found in grocery stores. This type of cinnamon contains coumarin, a blood thinner that can become dangerous for individuals already on anticoagulant medications.

"True cinnamon from Sri Lanka carries a lower risk due to its reduced coumarin content," noted Amar Chittiboyina, associate director at the National Center for Natural Products Research. Still, with the supermarket shelves stacked mainly with Cassia, many consumers might unknowingly be exposing themselves to risks.

A Spice Celebrated — With a Side of Caution
Cinnamon has been long praised for its potential health benefits, from regulating blood sugar to fighting inflammation. It has even been hailed as a natural ally against diabetes. Yet, this new research serves as a crucial reminder: even the healthiest foods can backfire if consumed without moderation or medical guidance.

The warning is especially important for people living with chronic conditions such as hypertension, diabetes, arthritis, HIV, or cancer. "Our best advice is to talk to a health care provider before using any supplements along with the prescription medicine," Khan urged. "By definition, supplements are not meant to treat, cure, or mitigate any disease."