Every year, as millions of people around the world forge new resolutions to eat healthier and lose weight, US News & World Report releases a conveniently timed ranking of the best diets. A panel of experts in obesity, nutrition, diabetes, heart disease, and food psychology rigorously rate each of 39 diets on seven criteria:

• Likelihood of losing significant weight in the first 12 months
• Likelihood of losing significant weight over two years or more
• Effectiveness for preventing diabetes (or as a maintenance diet)
• Effectiveness for preventing heart disease (or for reducing risk for heart patients)
• How easy it is to follow
• Nutritional completeness
• Health risks (like malnourishment, too-rapid weight loss, or specific nutrient deficiencies)

1. Mediterranean diet

Emphasis on fruits, veggies, whole grains, olive oil, beans, nuts, legumes, fish and other seafood. Eggs, cheese, and yogurt can be eaten in moderation. Keep red meats and sugar as treats.

2. DASH (dietary approaches to stop hypertension) diet — TIE

Eat lots of fruits, veggies, lean protein, whole grains, and low-fat dairy. Avoid saturated fats and sugar.

2. Flexitarian diet — TIE

Be a vegetarian most of the time. Swap in beans, peas, or eggs for meats, and consume plenty of fruits, veggies, and whole grains. You can look up more details because there’s actually a full meal plan involving breakfast, lunch, dinner, and two snacks to add up to a total 1500 calories per day. But feel free to also just swap in flexitarian meals ad hoc.

4. Weight Watchers

The first actual paid program on the list, WW uses a points system to guide dieters towards foods lower in sugar, saturated fat, and overall calories while consuming slightly more protein. There are a variety of paid WW plans, with the lowest being about $20 per month.

5. Mayo Clinic diet — TIE

A two-part system, with part one (‘Lose it!’) involving adding a healthy breakfast (i.e. fruits, veggies, whole grains, healthy fats) plus 30 minutes of exercise per day. You’re not allowed to eat while watching TV or consume sugar except what’s naturally found in fruit. Meat is only allowed in limited quantities, as is full-fat dairy. The second phase (‘Live it!’) is basically the first phase but with more flexibility. You aren’t realistically going to cut out sugar forever, and the Mayo Clinic diet acknowledges that. So the long term plan involves lots of whole grains, fruits, veggies, and healthy fats. Less saturated fats and sugar.

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