I'm having a hard time finding the biologically active GTF chromium that is recommended. I found the Solgar brand in one e-store, but I have a phobia about giving cc info over the web, and when I called the toll-free #, I was so freaked out by the phone rep. (I think I might have interrupted his nap), that I didn't want to do business with him, either. I've checked the stores in my area--no success there.. Not so concerned about the brand, but I do want to buy the right thing. Any suggestions for me?