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Harold J. Katz 1972-today: Nutrisystem Founded by Harold J. Katz, then 34, who was inspired by his mother's continuing struggle to lose weight, Nutrisystem became one of the earliest meal delivery providers in the diet industry.

Harold KatzNutrisystem / Founder Nutrisystem was founded by vacuum-cleaner-distributor-turned-Philadelphia-76ers-owner Harold Katz as Shape Up in the early 1970s.

Nutrisystem is a commercial provider of weight loss products and services headquartered in Fort Washington, Pennsylvania.

Nutrisystem is a popular weight loss program that's been around since the 1970s. The premise of the diet is simple: Eat six small meals per day to help prevent hunger - theoretically making it easier to lose weight. By limiting the calories in your meals, you can lose weight via calorie restriction.

Nutrisystem is a diet program that provides premade meals and snacks to help make it easier to lose weight through a calorie deficit.

Nutrisystem's meals have a couple of features scientifically shown to help weight loss and support overall health. Nutrisystem creates meals that are high in protein and have a lower glycemic index rating. Research shows that this combination can help you feel satiated longer, potentially reducing your eating intake.

The company is majority-owned by Kainos Capital, a Dallas-based private-equity firm specializing in food and consumer products, which closed a $1 billion fundraising round in February.

Overall the diet is healthy for people with conditions like heart disease, high blood pressure, high cholesterol, and diabetes. Meals are low in sodium, saturated fats, and trans fats, and include high-fiber whole grains, smart carbs, healthy fats, lean protein, and a wide variety of foods.

Nutrisystem meal plans are healthy in that the portion control helps provide a minimal number of calories to support weight loss, and meals are designed by nutritionists and dietitians to be in line with nutritional guidelines set forth in the 2020-2025 Dietary Guidelines for Americans.

Pros of the Nutrisystem Diet Convenience and space for variety top the list. Convenience: Proponents of the Nutrisystem plan find it easy to follow because foods are pre-portioned to keep calories low, promoting weight loss. Having meals delivered to your door is a convenience factor that some people find appealing.

Scores are based on experts' reviews. Nutrisystem is easier to follow than many other diets and has few nutritional deficiencies. Experts felt dieters would likely drop some pounds in the short term on Nutrisystem, thanks to its portion control and built-in calorie restriction delivered in convenient packaged meals.