B1 in large doses changes person body odor. There is no consistent proof that this odor is unpleasant to lil bugs. Since like Vitamin C excess of this vitamin is expelled in urine there is no worry of possibility of overdose.

Vitamin B1 (Thiamine) is also used in emrgency field. In case of diabetic coma we give people dextrose (form of glucose)followed up by vitamin b1 shot that helps to obtain energy from glucose (enzyme in carbohydrate metabolism).

Matt