• Redefine Weight Management Success: GNC Total Lean® Burn & Define Vitapak® Program provides key nutrients while you cut calories, increases metabolism, and enhances your diet for healthy weight loss. • Cover Nutrients While You Cut Calories: Support immune health, energy production, and nourished hair and skin with a Total Lean® multivitamin to fill in key nutrients you miss while eating less. • Boost Energy & Metabolism: Burn up to 60% more calories with your Vitapak® Program's clinically proven thermogenic and fuel fat metabolism and muscle recovery with a daily boost from L-carnitine. • Find A Better Balance With CLA & Waterex™: Refine your physique with help from CLA to improve your levels of fat mass vs. lean body mass and Waterex™ to manage water balance. • 5-in-1 Convenience, Quality & Savings: Each pack is wrapped with a patented foil to preserve pill quality and potency—and offers savings compared to buying each product separately. Clinically proven to increase post-workout calorie burning by up to 60% for up to one hour after a workout. This double-blind, placebo-controlled, crossover study consisted of 22 healthy men and women. Participants exercised on a treadmill on two occasions. On one occasion, they took Burn 60™ before exercise and on the second, they took a placebo. The amount of calories burned during the first hour post-exercise was measured, and participants burned up to 60% more calories while on Burn 60™ compared to when they took the placebo.