Celeb trainer and GOOP cohort Tracy Anderson does not mince words when asked about her business partner, Gwyneth Paltrow's well-documented affection for juice cleanses. "I 100 percent hate them. I think it's a really unfortunate trend, and it's not a sustainable weight-loss program. Plus, once you puree anything, you lose nutritional value by the second. You're drinking calories: If you're going to drink that many calories, you might as well eat anyway. It's extreme dieting," Anderson recently told Allure. "Skinny is not the end all for beauty -- a lot more goes into being beautiful than [whether you] have extra weight on you." To be fair, most of the cleanses GOOPy promotes on her site suggest that their detoxifying benefits are priority No. 1.