Not so sure about blended frozen fruit. It's a potentially dangerous way to ingest way more fruit than you would ordinarily eat in a single sitting, and therefore a huge sugar hit to the system. I used to do these every day until I was hit with atherosclerosis (no doubt a result of a previous crappy lifestyle, but I am sure these contributed). Juicing veggies with a bit of fruit, maybe; but just fruit could be bad for your metabolism. Personally I have switched to keto and feel better than I have for years, your preferences may differ.