the flavorings that are sold separately include sweetener.
I tried the plain, unflavored, unsweetened once - I wouldn't do that again.
I have some
LorAnn flavorings that are not sweetened - I use them in vanilla-flavored whey (amongst other things). I forgot that little fact (that they are unsweetened) once and made a flavored shake with the unflavored, unsweetened whey. I wouldn't do that again either.