if you are an athlete, you need protein. i reccommend Pro Complex from Optimum Nutrition. it has added digestive enzymes, which helps you absorb the nutrients, as well as glutamine (which helps you recover, and if you have a low nutritional store of it (from training), you get sick easier). it is probably the best. protein IS a natural thing, it's not dangerous for anyone 10 or older, at lowest, to use protein supplements. depending on how much you absorb, protein supplements generally have a better quality.

by the way, cooking eggs increases it's protein bioavailability, how absorbable it is, as well as it's quality.