Normal people use it too! I use a protein powder called NRG, which has balanced amino acids for a complete protein.
I have a really, really hard time eating in the morning. I found that if I make myself a "smoothie" (NRG, papaya juice, a tablespoon or so of flaxseed oil, a dash of honey, frozen berries and / or fruit, depending on my mood) then I am much better about starting out the day with something other than my beloved coffee.
I buy mine at our local co-op, but I know that the better grocery stores which have heath-food aisles usually carry a couple brands of protein powder as well.