Actors Jennifer Anston, 50, and 43-year-old Reyes Witherspoon, the mother of three, revealed the secret of maintaining their youthfulness, the Daily Mail reported.
The two stars expressed that they follow a diet based on abstinence for 16 hours, with a commitment to drink fresh juices daily, and exercise six times a week.
Their diet is based on an open day where they can eat any kind of food.
However, a dietitian said that such diets may not be suitable for everyone and should follow a diet that suits everyone according to their weight, age and health.