I was wondering the same thing, and that's why I didn't order it!! I get my (vegan) protein powders with zero sweeteners added (natural or artificial), and can choose to sweeten with fruit, stevia, or not at all :)
Any suggestions on how I could take part in the program since I can't eat any of the allowed protein sources...and soy and dairy are out.....?????
ps. I haven't eaten meat/poultry/fish in over 25 years, so I'm certainly not starting now, lol!