If you love spicy food, you are not alone. But scientists are taking a closer look at whether eating a lot of chili peppers could affect your cancer risk. Could your love of spicy food come with hidden risks? A growing body of research suggests that chili peppers, a staple in many cuisines worldwide, may play a complex role in cancers of the digestive system.
Gastrointestinal cancers, including colorectal, stomach, and esophageal cancers, are among the leading causes of cancer-related illness and death worldwide. Because these diseases are often detected late, researchers are eager to identify lifestyle factors that might help prevent them.
Chili peppers are a major part of diets across the globe. They contain capsaicin, the compound that gives them their heat. Capsaicin has been linked to beneficial effects in lab studies, such as reducing inflammation. At the same time, some research suggests it may also encourage the growth of certain cancer cells, which has made its overall impact unclear.
To better understand this, researchers reviewed existing studies on chili pepper consumption and gastrointestinal cancer risk. They analyzed 14 studies involving more than 11,000 people, including over 5,000 cancer cases. Overall, people who ate the most chili peppers were about 64% more likely to develop gastrointestinal cancers compared to those who ate the least.
However, the results were not the same for every type of cancer. The strongest link was seen with esophageal cancer. People with high chili pepper intake were nearly three times more likely to develop this type of cancer. In contrast, no statistically significant increase in risk was found for stomach or colorectal cancers, although stomach cancer showed a non-significant trend toward higher risk (about 77% higher in the highest intake group).
The researchers wrote that their findings “suggest that chili pepper is a risk factor for certain GI cancers (e.g., EC).” Where people live also seemed to make a difference. Higher risks were observed in studies from Asia, Africa, and North America, while studies from Europe and South America actually showed a lower risk.
One possible explanation is how much chili pepper people typically consume. In some regions, intake is much higher, which could influence the results.
