Sources of Thiamine (Vitamin B₁):

Peas
Beans
Nuts
Pork
Beef
Whole-grain and enriched cereals

Thiamine boosts energy by metabolizing carbohydrates, fat and protein. The recommended daily allowance is 1.5 mg, and although no side effects are known for considerable higher doses, excess amounts will be of no use to the body and will simply go to waste.