Gnu: I am always on B, etc. We noticed at a gathering on Manitoulin Island, years ago, that those of us who did B were less bitten. Living in rural central Ontario for 17 years, the biggest problem was - are those the seeds I'm trying to plant or...? Actually if one is going to live rough in a cold climate, I found, by accident, in a dreadful flat in Montreal that extra B kept me from shivering to sleep every night. When I forgot, I shivered. That is very scientific research, yes? Good enough for me!