Best Commercial Diet Plans

If you’re considering a diet, brand-name programs like Weight Watchers, Jenny Craig and Slim-Fast might come to mind, but there are others. Experts who rated the 13 diet plans below for U.S. News found wide differences in effectiveness. Among the qualities considered by the experts were each diet’s ability to deliver weight loss, provide good nutrition and safety, and be relatively easy to follow.



(2.7 out of 5.0)

Medifast recipes | Medifast reviews

Medifast’s mainstream adult program earned respectable ratings as a short-term weight-loss diet, but the experts found that it left much to be desired in several other measures, among them how easy it is to follow.

How the Medifast Diet works



(2.3 out of 5.0)

Atkins recipes | Atkins reviews

Experts rated Atkins a strong performer in short-term weight loss but were less generous with their scores in nutrition, safety, and how easy the plan is to follow.

How the Atkins Diet works


Dukan Diet

(2.0 out of 5.0)

Dukan Diet recipes | Dukan Diet reviews

The diet failed to impress the experts in any category. It scored especially low in nutritional completeness and safety, as a diabetes or heart diet, and how easy it is to follow.

How the Dukan Diet works

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Best Diets Rankings

Best Diets Overall
Diets ranked by across-the-board effectiveness.

Best Weight-Loss Diets
Diets ranked by effectiveness for both quick and lasting weight loss.

Best Diabetes Diets
Diets that can prevent diabetes or help diabetics.

Best Heart-Healthy Diets
Diets that lower cholesterol, blood pressure or triglycerides.

Best Diets for Healthy Eating
Diets ranked by how safe and nutritionally complete they are.

Easiest Diets to Follow
Diets ranked on whether they're a snap to stick to.

Best Plant-Based Diets
Plant-based diets ranked by overall effectiveness.

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