Spyru Inc. developed a line of same-named sports drinks derived from spirulina, a blue-green freshwater algae composed of nearly 70 percent protein. Available in Lemon-Lime, Orange and Fruit Punch varieties, a 16.9-ounce beverage contains 20 grams of protein and 45 calories in each 8-ounce serving. Spyru energy supplement drinks are targeted at serious athletes as well as health- and fitness-conscious adults, the company says.