Thanks to everyone who chimed in. Here's an update, and thankfully a very happy update. We tried Acetyl-L-Carnitine, L-Carnitine, Gaba, and Magnesium, all at different times trying to use a scientific approach to see which one would work. None of them worked. An employee at our local health food store suggested a detox tea called Flora-Essence. At this point we were ready to try anything. Well the difference was night and day. She took one dose before she went to bed and the next day she hardly ticked at all. She went from ticking up to 9 times per minute to maybe 3 or 4 times PER DAY. We don't even notice it anymore and when she does we realize how much better it is because we don't hear it hardly at all now. This detox tea was a blessing. I drink it myself. We basically decided, instead of 'masking' the problem w/ these other supplements, why not just take the detox tea and let it do what it's supposed to do, which is basically flush the body of all the bad toxins. We truly believe this all started from the hot dogs. My wife kept a journal for the past few years and reading the past entries, all her major tics were set off after eating a hot dog. Besides all the junk that is in a hot dog, we also found out that most hot dogs have nonfat milk inside. My daughter is allergic to dairy so we believe the combination of milk and junk sets off her tics. Anyway I just wanted to let you all know of our experience and what has helped our daughter to almost get rid of her vocal tic. Like I said, we hear it a few times a day but hardly. It's much better than the few times A MINUTE we were previously hearing!