Blueberries are often called a “superfood.” This small but mighty berry is loaded with nutrients . They have been shown to protect against heart disease and cancer, and can also help maintain bone strength, mental health, and healthful blood pressure. Blueberries contain a plant compound called anthocyanin. This gives blueberries both their blue color and many of their health benefits.
Blueberries are a good source of several vitamins, including:
Vitamin C: An antioxidant that helps with collagen and hormone synthesis, wound healing, iron absorption, and a healthy immune system  
Vitamin K: May help with heart health, artery function, and diabetes risk  
Manganese: Helps with bone development and converting proteins, carbs, and fats into energy  
Vitamin A: Helps with acne and moderating oil levels in skin  
Blueberries are also a good source of dietary fiber and contain many beneficial plant compounds, such as anthocyanins, which are antioxidants that give blueberries their blue color.  
Eating blueberries regularly may help with: Preventing heart disease, Improving brain health, Moderating blood sugar levels, Reducing oxidative stress, and Improving sleep quality.