With a multilevel marketing business, are you allowed to sell to stores?

I'm seriously considering getting into a MLM company called Reliv. They make shakes that provide 100% of all your daily nutritional needs. (www.reliv.com) I just had this crazy idea of putting it in bottles (they sell it in powders) and selling it as "nutrition in a bottle"/natural energy drink to health food stores, schools, coffee shops, smoothie shops (as the powder to put in smoothies), etc. The possibilities are endless. But is it legal/okay to do that with a MLM business? That's my main question. But if I were to do this, what kind of training/knowledge/education would it require? How much money and resources would it take to start out?