Its best to have the freshly brewed stuff instead of the processed massed produced stuff (think of commercially made kefir vs. homemade). As far as the sugar content, if its low, then I think it should be fine. The question is whether boulardii is good for you or not and I haven’t experimented with it.
I talked to my naturopath about boulardii last friday and he hasn’t really heard of it. The way he looks at it is…this doesn’t treat the environment/mechanism that created pathogenic candida in the first place. He also feels that lactic acid is something you don’t really want in high amounts in the body. I haven’t researched his claims but just wanted to mention the information.