Did you know... that early American colonists made grey paint by boiling blueberries in milk? If all the blueberries grown in North America in one year were spread out in a single layer, they would cover a four-lane highway that stretched from New York to Chicago. Blueberries have been commercially cultivated only since the early 20th century, when the USDA helped develop new improved varieties. The blueberry is the second most popular berry in the U.S., the strawberry is number one. Over 200 million pounds of blueberries are grown commercially each year. Blueberries contain significant quantities of both anti-bacterial and anti-viral compounds, and have a reputation in northern Europe of fighting infections. They may also help protect against heart disease. The North American blueberry industry ships more than 100 metric tons of fresh blueberries each year to Iceland, and more than 500 metric tons to Japan. (2005) North America produces nearly 90 percent of world blueberry production (2005). Maine produces about 25 percent of all the blueberries grown in North America. Blueberries are deep in color, ranging from blue, maroon, and purple. There are around 30 different species of blueberries. Blueberries are rich in potassium with a good amount of phosphorus, magnesium, and calcium. It also has a small amount of iron, sodium, zinc, copper, manganese, and selenium. Blueberries are rich in vitamin C and choline with a good amount of vitamin A and small amount of vitamin E, K, B6, thiamin, niacin, folate, pantothenic acid, and betaine. Calorie Content of Blueberry: 100g of blueberries have 57 calories. Calories from fat are 3. Blueberries contain antioxidants that help slow the ageing process, reduce the risk of cancer, reduce eyestrain, prevent urinary tract infections, treat coughs, and offer protection against macular degeneration. Blueberries can also lower cholesterol, help relieve both diarrhea and constipation, and act as astringents in the digestive system to reduce inflammation. Want to read more? Subscribe to one of our monthly plans to continue reading this article.