Onions may not be the first food that comes to mind when you think about heart health, but new research suggests they deserve a closer look. In a study of more than 160,000 adults, researchers found that people with a genetic preference for onions tended to have lower blood pressure and a reduced risk of Type 2 diabetes. While the findings don't prove onions are the direct cause, they add to growing evidence that everyday whole foods may play a powerful role in supporting long-term health.
Onions are rich in beneficial plant compounds, including quercetin and sulfur-containing compounds, which have been studied for their antioxidant, anti-inflammatory and cardiovascular-supporting properties. Researchers say onions were the only one of 140 foods examined whose association remained consistent across multiple analyses, making them a standout in the study. The findings also highlight a growing area of research exploring how our genes influence food preferences and how those preferences may affect disease risk.
Rather than looking for a single "superfood," Dr. Mercola encourages building your diet around a wide variety of whole, nutrient-dense foods. Onions are inexpensive, versatile and easy to incorporate into everyday meals, making them a simple addition to an overall healthy lifestyle. While more research is needed to determine exactly how onions influence heart and metabolic health, this study is another reminder that some of the most powerful health-supporting foods have been sitting in our kitchens all along.
SOURCE:
AOL, July 1, 2026