These fungi are little nutritional powerhouses. The cardiology review notes that they have anti-inflammatory compounds, antioxidants, and vitamin D, plus a set of other bioactive compounds that help reduce hardening of the arteries, cholesterol, and blood pressure. They’re the only vegetable to contain any vitamin D, in fact, and It only take three ounces of button mushrooms to provide your entire daily dose. In one study, people with type two diabetes who ate oyster mushrooms had a significant decrease across multiple measures of heart health, including blood pressure, blood glucose, and cholesterol. They also seem to be associated with less cardiovascular disease overall, as well as lower rates of type two diabetes and obesity, which increase the risk of developing cardiovascular disease.