The U.S. News & World has released their 10th annual ranking of the best and worst diets in 2019.
They looked at 35, including Keto, Whole 30, and Paleo, concluding that many of the most popular diets ranked among the WORST in terms of safety, weight loss, nutritional adequacy and sustainability (ease of following).
For example, the Ketogenic Diet ranked almost last at #34. This is a popular, very low carbohydrate diet which puts the body into a state of fat burning for energy. Experts gave it very low scores for safety, nutrition, long-term weight loss, heart health, and ease of following. I personally agree that it is unnecessarily restrictive for most people, and comes with too many potential drawbacks.