Vitagro seems to have tanked amid rumors that the product was reformulated. I guess a founding creator or chemist took off after they switched from a corn-based formula to one based on barley starch.
*Not sure if that's BS, but a google search revealed much of the same talk.
If rice sugar is just as good in terms of rate of absorption, and the bio availability is similar, that's just yet another product I'll have be soon acquiring.
On the flip side, carbolyn does seem to mix and work quite well.