Balance Bar, sometimes styled as balance bar, is the brand name of a nutritional energy bar based on the 40-30-30 dietary principle, that is, a diet containing 40% carbohydrate, 30% protein and 30% dietary fat. The 40-30-30 nutritional philosophy was popularized by Dr. Barry Sears, a biochemist, and later expounded in his Zone diet books.
The product was first released in 1992. Since that time, the product line has expanded to include Balance Bar, Balance Gold, Balance Trail Mix, Balance Plus, Balance CarbWell, Balance Gold Crunch, Balance Outdoor, Balance Organic, Balance 100 Calories, Balance Bare, and 40-30-30 Balance Drink Mix. Balance Bar is a subsidiary of NBTY.