I read on the message board a while back that vitamin B is good to take as a sand flea repellent. Can anyone tell me more about this? Last year my husband suffered terribly from sand flea bites at CSS (thankfully, the bites didn't become terrible until our last day there, so he was still able to enjoy himself). We will be at CTI in late March, and would like to know what he can do to prevent this from happening again. If Vitamin B does help, does he just take regular vitamin B, or a multivitamin? There are several kinds in the store. Also, does he have to take it for a while before we leave so that it is in his system? I currently take prenatal vitamins. Does anyone know if these will work for me as a sand flea repellent? I didn't have a problem last year, but I'm willing to take any steps necessary to avoid what my husband went through. Thanks for you help!