From koloz.com:

Emily Deschanel has been a Vegan since she was 15 and watched a documentary on the meat industry. Since then she has committed her lifestyle to animal cruelty-free. That means no animal products consumed or worn which includes many things we take for granted: wool, silk, honey, most shampoos and beauty products. It’s not an easy lifestyle and while I do not practice that in the slightest I greatly admire her heart and dedication.

Along with that, she appears at many charity events related to her choice and lends her talents where she can. One such avenue is a new documentary entitled “Meat the Truth.”