Take a large amount of vitamin B-12 daily. B-12 is what you may have associated with the smell of fresh baked bread. The tablets smell like a commercial bakery. You can't overdose on B-12, you just sweat it out. Sweating it out masks the smell of your blood, and mosquitoes, ticks, chiggers, and fleas will all just kinda ignore you. Doesn't work on bedbugs since it doesn't mask the smell of you exhaling, which is what bedbugs use to hunt.

A large amount would be between 500-1500 mg daily depending on your size.