I am a 50 yr old male that is likely more active than 99.9% of the population.  I cycled over 15,000 km last year on top of almost daily yoga and maybe 30 days of snowboarding.  I can assure you that the amount of protein you need from supplements is ZERO and the amount of protein you need from animal products is also ZERO.  Leslie is 100% correct when she states that supplements end up as substitutes for whole foods so you are wasting your money and your calories.  Rice and beans (just one example) is the complete amino acid.  Whole food plant based diet.  Supplements = snake oil.  Get enough calories and you get enough protein.  What is the medical term for a protein deficiency? (hint - its called starvation).