Protein is protein. It’s true that animal products have more complete proteins than most vegetarian sources. However, simply eating both legumes and grains provides complete proteins for your body. There are many successful vegan athletes, many at top levels. Venus and Serena Williams, two of the best women tennis players of all time. Tom Brady, six-time Superbowl winning quarterback of the New England Patriots. John Salley, four-time NBA champion. Barny du Plessis, 2014 Mr. Universe. The list goes on.