I've been taking this product every summer for three years now! Though I found it takes a month or so to build up enough B1 in your system to repel the mosquitos, this product is awesome, living next to the sea we have major mosquito problems over summer, so I just start taking this Anti-Bite a couple of months prior to the mosquito season, and may only get one or two bites the entire season, whereas prior to taking this I was covered in bites daily!!
Just remember to build up by taking 3 tablets of Anti-Bite for at least a month (even two months) before you need it!!