Watermelon seeds are good as a snack which can be had in roasted, sprouted, and other forms. It contains nutrients like vitamin B, niacin, folate, thiamine, magnesium, iron, potassium, copper, and pantothenic acid. They are great for a healthy heart as it promotes normal heart functioning, being a good antioxidant. Watermelon seeds can be added to baked goods, sprinkled over breakfast, rice, and soups.