Actress Gwyneth Paltrow has come under fire from a health expert for promoting a drastic detox program on her website.

The Shakespeare in Love star recently told fans she was embarking on a cleansing diet initiative, and she featured the Cleanse kit on her Goop site.

The detox involves eating one low-calorie meal a day, two protein shakes and vitamins, but the chief dietician at St. George's Hospital in London is unimpressed with the diet plan.

Catherine Collins tells Britain's Mail On Sunday, "She is not a nutritional expert. I would not recommend it."

The makers of Cleanse insist: "It simply supports the body's natural detoxification process."