I take odorless garlic(1250) all year round and two weeks before I go, I double up the dosage(2500) and while I am there also. I may have gotten one or two bites, while everyone else was getting bit. It made me a believer in garlic. Also the bites that I did have,did not itch, but only for a minute and were gone in about a day. Maybe it was just me, but... I wont go without to try and find out.