We all know that losing weight doesn't happen overnight, and that it happens at a different rate for everyone. But to some, that means progress doesn't start to show until weeks or even months have passed. So how are we supposed to stay motivated without seeing early results?

According to Courtney McCormick, MPH, RDN, LDN, and Nutrisystem Corporate Dietitian, "Studies have shown that early weight loss is a predictor of long-term success." To help increase your chances of a healthy lifestyle, Nutrisystem is introducing its all new Lean13 weight loss program.

With the Lean13 weight loss program from Nutrisystem, you move right into the fast lane and begin passing milestones immediately. Lean13 is a quick-start weight loss plan designed to help speed up your results from the outset. In a clinical study, subjects lost up to 13 pounds and 8 inches overall in their first month on the Lean13 plan.* This is two times the weight lost by subjects dieting on their own.

The key to the power of Lean13 is the boost you get from the Turbo Takeoff when you begin the program. To help you start strong, you'll be set up with all of your meals and snacks during the first week. This includes seven days of specially selected meals, seven protein- and probiotic-packed TurboShakes™, and seven NutriCrush® bars that keep you full between meals with protein and fiber.

Along with the meals, Lean13 offers a specially designed Daily Tracker log to help you record and maximize your results. Plus, you get free access to NuMi, their helpful, easy-to-use weight loss app. Every step of the way, you'll have a constant professional support team with comprehensive counseling options from trained weight loss coaches and certified diabetes educators, plus access to The Leaf, Nutrisystem's weight loss blog full of helpful weight loss tips, information and inspiration.

After completing your first week, you'll move on to your Nutrisystem meal plan, designed to deliver steady weight loss results. It's that simple. Nutrisystem has a proven track record for helping to inspire a healthy lifestyle. Lean13 can be the quick boost you need to achieve weight loss success for life.

UPDATE: The awesome folks at Nutrisystem are extending a special offer to our readers.Follow this link to receive 40% off the one-time rate with new 4 week auto-delivery order!

This content is sponsored by Nutrisystem.

Note: Lean13 may not be appropriate for all, such as diabetics, but Nutrisystem has plans specifically designed for individuals living with diabetes. Check out the Nutrisystem plans or call a Nutrisystem counselor for more information.

*In a study, avg. weight loss was 11.6 lbs and 8 inches. Results vary based on starting weight and program adherence. Inches lost from hips, waist, chest, thighs and arms in first month.