Mayim Bialik is advocating a vegan lifestyle and trashing the idea of eating meat in a new ad for People For the Ethical Treatment of Animals (PETA).

In the ad, “The Big Bang Theory” star is dressed as a 1950’s housewife who holds a steak over a garbage can as she turns up her nose.

The caption reads “It's a No-Brainer: Go Vegan!”

In an interview on YouTube, Bialik, who is a vegan, says she has always felt guilty about “eating animals.”

“Even as a child, I felt very guilty about eating animals and never knew that there was something to do about it. And as I got older, it became clearer that there are things that I can do and choices I can make,” she says in the video.

She explains that she teamed up with PETA because she considers the organization the industry standard for veganism and as a mom of two vegan kids, she wanted to show other moms that veganism is “completely compatible with being a parent and raising healthy kids.”

Bialik also says that since cutting out dairy, she hasn’t had a sinus infection or needed to take antibiotics.