DALLAS, Texas — Beyoncé reportedly did a detox cleanse to slim down for her role in "Dreamgirls."
Gwyneth Paltrow, Salma Hayek, and Anne Hathaway are also believers.
But it's not just Hollywood starlets looking into the benefits of cleanses. Molly McKone and Emily Kellogg, both 21, have made it part of their lives, too.
"For me, it just restarts my body," Kellogg said. "You feel good. You feel really good."
"I would say a lot of girls are doing cleanses these days," McKone added. "[It's] a lot more popular this year."
Cleanses aren't just for rapid weight loss any more. They are used to clean the colon, restart digestion, boost immunity, clear the complexion, and help the body run better.
The Dr. Oz Show recently spent an entire week on the value of cleansing.
"The issue with cleanses is: How do you do them safely?" Dr. Mehmet Oz asked during an interview with KVUE's sister station WFAA. "If you can do them safely, they make a ton of sense."
Many doctors used to dismiss cleanses as a dangerous fad diet. Many cleanses are low in calories and nutrients. Also, animals don't need cleanses.
Dr. Oz said that reasoning isn't right.
"Animals don't cleanse, but animals aren't exposed to a lot of toxins we put in our body," Dr. Oz said. "They don't drink a lot of alcohol; they don't smoke; they don't have environmental issues that are influencing them by the foods that they are eating; they don't have junk food."
Cleanses come in all forms now, from prepackaged pills to juices you can buy on the Internet or squeeze by hand at home.
Molly McKone recently did a three-day Master Cleanse, which uses lemon juice, maple syrup, cayenne pepper and water.
"I liked how it made me feel," McKone said. "But I'm not going to lie... I was hungry and I was a little moody."
Emily Kellogg said she does a variety of cleanses regularly. And while they take self-control, she said nothing beats how she feels afterwards.