The "House" actress poses in her birthday suit atop a bed of fresh green-leaf vegetables in PETA's new pro-vegetarian print ad, below the slogan: "Eat Green to Go Green."
Shot by celebrity photographer Jack Guy, the 44-year-old beauty attributes her fit figure to a meat-free diet that spans three decades.
"Vegetarianism is a really important part of what we need to do to help the environment," Edelstein says in an interview with the animal rights organization. "The meat industry is really toxic to the environment. The cattle industry-besides the fact that there's a lot of cruel things happening-the manure is extremely toxic."
The actress also said she decided to pose in the buff to help raise awareness of the negative environmental impacts of meat production, such as water pollution and land degradation.
"I like to encourage people to be a vegetarian once a week and then maybe twice a week," Edelstein continues, "because that makes such an enormous impact for the whole world that it's really valuable for everyone. So I'm just trying to push that campaign forward-with my body, apparently."