It would honestly be very hard to find someone who is protein deficient because protein is found everywhere, from veggies to grains. (yourdailyvegan.com)
Unfortunately many people are protein deficient due to poor eating habits, improper food combining, calorie restricted diets, etc.. (obistrong.com)
People of all ages including and especially children and older people tend to be protein deficient which affects both physical and mental health. (obistrong.com)