THE PURIFICATION OF DEMI

DEMI MOORE lasts just 4 days on ten-day Detox Diet!

Even maple syrup goodies couldn't keep Mrs. ASHTON KUTCHER on the Master Cleanse after vowing to follow hubby down the extreme purification route.

Reportedly, Demi was supposed to suck down a brutal brew of cayenne pepper lemon juice and maple syrup.

But Demi, 47, said yuuuch and decided she'd rather switch than purge - and went over to the 21 day Clean program developed by a renowned cardiologist.

Now instead of a sickly sweet concoction, Demi could dine on a breakfast shake for breakfast and dinner and a lunch consisting of veggies, a grain and a protein.

Demi Tweeted, "I think you need to research what it is I am doing there is no starving involved! It is all about nourishing the body!"

But dietician Kerri Gans, a spokesperson for the American Dietic Association told the NY Daily News that diet plan is six servings a day shy of fruits and veggies.

"This is just another example of a fad diet that is promising quick weight loss," Gans said. "It's unfortunate that celebrities go on diets like this. They need to be good role models.

"And after a diet like this, you always gain the weight back."