Gwyneth Paltrow used to be best known as an actress, but in the last decade she's built an even bigger reputation as a health guru. Her newsletter venture, Goop, peddles an enviable lifestyle -- travel, fashion, anything that looks gorgeous in photographs -- but with a central message of living a clean, healthy life.

I try to eat healthy. I really do. But if I haven't planned ahead and don't have a healthy meal in the fridge, I could end up eating anything. I won't go into detail except to say that one time I had cookies for dinner right before rushing off to teach a nutrition class. I'm not proud.