. >> rose: kathy preston is here. her books and writing focus on healthy living and conscious eating. her new book tops the physical, spiritual and environmental benefits of a plant-based diet. it's called "veganist: lose weight, get healthy, change the world." i'm pleased to have kathy preston, my friend at this table. welcome. >> thank you, charlie. >> rose: so what is it your husband said? he said you were veganists? >> yes, i was giving him... one day i was going off on one of my spiels about why it's hell thoi eat vegan and he said "honey, you're the veganist." i thought, well, okay as someone who's obsessed with a violin and wants to learn more is a violinist and i'm obsessed with all things vegan so i'm a veganist. >> rose: what does that mean? >> it means i eat a plant-based diet. and i do it not only for health reasons because you lose weight, you prevent and reverse the major diseases like cancer, heart disease, type two diabetes b. but you are also doing the best thing for environment. you're also doing som