4. Mayo Clinic diet

You're in good hands with this diet developed by the high-profile medical center. The experts liked the plan's unique eating pyramid, which promotes foods with low energy density (you can eat more but take in fewer calories) like fruits and veggies. It took home all 4s and 5s, save for one 3, in both safety and nutrition categories. Click here for the full review.

Score: 4.5

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