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Hollywood star Angelina Jolie is causing concern on the sets of her new film ‘Salt’ with a new diet called liquid detox.

The Tomb Raider actress aims to shed 21 pounds in just 21 days for her role in the film as a CIA officer unmasked as a Russian spy and she is raising eyebrows as everyone thinks she has a fantastic figure to lose, reports thesun.co.uk.

The diet - living on a mixture of lemon juice, cayenne pepper and maple syrup is also leaving her weak. "She does all her own stunts but we worry she could injure herself due to the weight loss," said a source from the film's unit.