Moss, 39, often pictured smoking or enjoying a glass of champagne, is said to be surviving on juice, fresh herbs, and daily enemas as part of her health kick, reported Sun online.
"Kate has detoxed here before and lost three-a-half kilos - she absolutely loved it. She really enjoys being healthy, eating clean and not drinking, and while the gym is not her natural calling, she does enjoy the odd spot of yoga.
"Kate feels mentally and physically cleansed, and reckons her skin and eyes look much brighter and clearer already," a source said.