Anyone who feels more tired than they should and winds up feeling fuzzy headed from eating so-called energy foods will likely benefit from the several safe supplements that boost energy levels, which are discussed in this User's Guide. Coenzyme Q10, alpha-lipoic acid, and carnitine are vitamin-like nutrients, not stimulants. They work by helping the body burn the foods consumed for sustained energy. This User's Guide also offers eating tips to help readers maintain high energy levels and to avoid feeling tired after meals.