Best Diets Overall

U.S. News evaluated and ranked the 32 diets below with input from a panel of health experts. To be top-rated, a diet had to be relatively easy to follow, nutritious, safe and effective for weight loss and against diabetes and heart disease. The government-endorsed Dietary Approaches to Stop Hypertension (DASH) snagged the top spot.


Traditional Asian Diet

(3.5 out of 5.0)

Traditional Asian Diet recipes | Traditional Asian Diet reviews

The Asian diet is a reasonable choice for an eating pattern, landing around the middle of the pack of ranked diets. Experts handed out high marks in nutrition and safety, but doubted the plan’s ability to deliver short- or long-term weight loss.

How the Traditional Asian Diet works


Vegetarian Diet

(3.5 out of 5.0)

Vegetarian Diet recipes | Vegetarian Diet reviews

As a health diet, vegetarianism is solid. It’s decent at producing rapid weight loss, according to experts, and is strong in other areas, such as heart health and nutritional completeness, that arguably are more important.

How the Vegetarian Diet works


Anti-Inflammatory Diet

(3.3 out of 5.0)

Anti-Inflammatory Diet recipes | Anti-Inflammatory Diet reviews

While the diet itself is nutritionally sound, experts expressed concern that it’s needlessly complicated, lacks supervision or feedback, and boasts unsubstantiated claims like the benefits of supplement use. “Most Americans would benefit from adopting many of these principles, especially increasing fruits and vegetables,” one expert said. “What is lacking is scientific evidence that this diet will reduce inflammation in the body and that weight loss results from following it.”

How the Dr. Weil's Anti-Inflammatory Diet works



(3.3 out of 5.0)

Slim-Fast recipes | Slim-Fast reviews

Slim-Fast is a reasonable approach to dieting, experts concluded. It outscored a number of competitors on weight loss and as a diabetes diet, and being highly structured, it’s fairly easy to follow. But it scored lower than many other diets on heart health.

How the Slim-Fast Diet works


Spark Solution Diet

(3.3 out of 5.0)

Spark Solution Diet recipes | Spark Solution Diet reviews

In its Best Diets debut, the Spark Solution landed in the middle of the pack, receiving 3.3 stars overall and tying with Dr. Weil’s Anti-Inflammatory Diet and the Slim-Fast Diet. Panelists believe the Spark Solution will lead most dieters to weight loss, given it’s tried-and-true principals of well-rounded meals, calorie reduction and exercise. A few experts pointed out that the diet is “not particularly novel,” and even more were not convinced of the long-term benefits of the Spark Solution, given the super structured plan only maps out dieters’ first two weeks of the plan.

How the Spark Solution Diet works


Flat Belly Diet

(3.2 out of 5.0)

Flat Belly Diet recipes | Flat Belly Diet reviews

The Flat Belly diet landed in the middle of the pack because most of its scores from the experts were right around average. It did get high marks in safety and nutrition.

How the Flat Belly Diet works



(3.2 out of 5.0)

Nutrisystem recipes | Nutrisystem reviews

Nutrisystem sits near the middle of the standings. It’s quite safe, easier to follow than many other diets, and has few nutritional deficiencies, according to experts. As a heart diet, it’s off the mark.

How the Nutrisystem Diet works


Abs Diet

(3.0 out of 5.0)

Abs Diet recipes | Abs Diet reviews

The experts found the diet moderately effective for quick weight loss and middle of the road in most other respects. They took issue with the company’s claim that dieters can drop up to 12 pounds of belly fat in two weeks and questioned the evidence behind some of its tactics.

How the Abs Diet works


Engine 2 Diet

(3.0 out of 5.0)

Engine 2 Diet recipes | Engine 2 Diet reviews

Experts handed out a below-average 3 stars. Though they acknowledged its benefits for heart health and diabetes control and prevention, they faulted the program for being unnecessarily restrictive and “gimmicky,” and called for more research into some of its claims. “I fail to see anything unique, innovative, or useful with this diet,” one expert said.

How the Engine 2 Diet works


South Beach Diet

(3.0 out of 5.0)

South Beach Diet recipes | South Beach Diet reviews

Although the South Beach Diet earned positive ratings for being able to produce rapid weight loss, its restrictions can make it difficult for dieters to keep the pounds off, experts said. Most were less enthusiastic about its ability to combat diabetes or heart disease.

How the South Beach Diet works

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Best Diets Rankings

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.

Best Commercial Diet Plans
Brand-name diets ranked by overall effectiveness.

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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