Looks like radio show host Steve Harvey won’t be eating solid food anytime soon. The comedian announced on his morning show that he’s decided to follow the “Lose 21 Pounds in 21 Days” Martha’s Vineyard Diet Detox, according to Gossip Jackal. The 21 Pounds in 21 Days motivates its followers and practitioners to drink vegetables and fruit juices for 21 days after every two hours.

Reports suggest that followers of the 21 Pounds in 21 Days are directed to avoid eating solid food except drinking juices for 21 days in order to achieve weight loss of 21 pounds. Participants of the 21 Pounds in 21 Days drink only fluids for 21 days in the confidence that they’ll detox their bodies, expedite metabolism and burn more fat.

People can check the progress of Harvey on the official site if 21 Pounds in 21 Days. Those people who are already practicing the 21 Pounds in 21 Days have the Facebook page of the 21 Pounds in 21 Days to share their experience.

A diet that encourages only juice consumption is a recipe for failure, says celebrity nutritionist Christine Avanti. “Where is the fiber if everything is all blended up?” she says. “And fruit drinks can cause blood sugar to spike.”

While followers of juice diets may lose weight temporarily, the chances of keeping off those pounds are very slim. “When you go back to eating regular food, having slowed down your metabolism, you’ll just gain the weight back.”