I'd like to emphasis the bit about fad diets. My own personal rule of thumb is to not try any diet that I couldn't keep up for 10 years. Especially if the diet

I'd like to emphasis the bit about fad diets. My own personal rule of thumb is to not try any diet that I couldn't keep up for 10 years. Especially if the diet cuts out some of your favorite foods. This cuts out a lot of them. My main exception to this is anything health related (diabetes, allergies, etc), but at that point you've already talked to the GP. Otherwise, you don't have a diagnosis or confirmed medical condition.