3. HCG Diet
This pairs a dangerously-low-calorie diet (500 calories/day) with human choriogonadotropin hormone shots, which aren’t FDA-approved for weight-loss.
4. The Paleo Diet
This focuses on eating how many people envision cavemen once ate, with lots of red meat and no “post-agriculture” foods. Studies have shown it doesn’t lead to weight loss, isn’t good for your heart and is difficult to follow. However, eating truly Paleo–mainly wild plants and lean sources of meat–could be a healthy weight-loss strategy.