Eat Often Eating small, frequent meals throughout the day prevents hunger and may boost your metabolism. On Nutrisystem, you keep your metabolism working continuously by feeding it steadily. Skipping Nutrisystem meals and undereating may actually slow your metabolism and hinders your weight loss progress.

about 1,000 calories per day The Fast 5 week meal plan provides about 1,000 calories per day. After those initial 7 days, the meal plans in the included Meal Guide or on the NuMi App will switch to either a 1,200 calorie meal plan for women or a 1,500 calorie meal plan for men.

Limited calories. The company's website claims that women can lose up to 13 pounds and 7 inches in the first month and men can lose up to 18 pounds and 8 inches in the first month on Nutrisystem for Men. After that, dieters can lose an average of 1 to 2 pounds per week.

Fasting did seem to spur noticeable short-term weight loss, the researchers found. People who fasted for five days lost about 4% to 6% of their weight; those who fasted for seven to 10 days lost about 2% to 10%, and those who fasted for 15 to 20 days lost 7% to 10%.

Bring a water bottle with you and sip it steadily throughout the day. If you need a change from plain water, you can also enjoy zero-calorie seltzer and sparkling water, black coffee, unsweetened tea and lemon water to help you reach that daily goal. Avoid alcohol until you get into your second week.

While you might lose weight initially on Nutrisystem, the program is expensive and makes you dependent on highly processed, packaged meals. Instead, Healthline recommends choosing a diet, meal planning app, or delivery service that makes it easier to eat healthy in real life.

Bring a water bottle with you and sip it steadily throughout the day. If you need a change from plain water, you can also enjoy zero-calorie seltzer and sparkling water, black coffee, unsweetened tea and lemon water to help you reach that daily goal. Avoid alcohol until you get into your second week.

Fasting did seem to spur noticeable short-term weight loss, the researchers found. People who fasted for five days lost about 4% to 6% of their weight; those who fasted for seven to 10 days lost about 2% to 10%, and those who fasted for 15 to 20 days lost 7% to 10%.

The bottom line. You can drink moderate amounts of black coffee during fasting periods, as it contains very few calories and is unlikely to break your fast. In fact, coffee may enhance the benefits of intermittent fasting, which include reduced inflammation and improved brain function.

The Nutrisystem website states that you can expect to lose 1–2 pounds (0.5–1 kg) per week if you follow the diet, and that men can lose up to 18 pounds (2.25 kg) the first month (1).

Despite its convenience, nutrition experts do not recommend this diet. The Nutrisystem diet has both practical and health-related drawbacks. Cost: Like many commercial weight loss plans, Nutrisystem won't fit into everyone's budget.

Today, Nutrisystem is still helping people lose weight with its frozen and nonperishable meals, snacks, shakes and desserts.