Alicia Silverstone knows that eating well can help the planet, which is one reason she decided to swear off meat and dairy and adopt a vegan lifestyle. But it's not all selfless: she also appreciates how her improved diet makes her look younger and glowing.

In a new interview with Health, the Clueless star talks about her eating philosophy, her line of cruelty-free beauty products, and her book The Kind Diet, coming out in October. Here are highlights:

  • On why she wrote the book: "Once you're informed, then you can be really gentle and kind to yourself, by giving yourself all the gifts life has to offer — like mental clarity and vitality — all while making the planet better."
  • On why she went vegan: "I didn't come at it, honestly, from a health point of view. I was 21 when I went vegan. And when anybody told me to be healthy, I thought people were just telling me [to lose weight] because I'm in this business. So I was like, 'Go F yourself!' [Laughs.] Yet when I look at those pictures from back then, I can see the puffiness in my eyes. It's weird to be 32 now and feel and look younger. . . . Right after I first made the switch to a plant-based diet, people were literally telling me, 'What have you done? You’re sparkling.'"

To read more highlights — including what Silverstone has to say about being naked in her backyard — read more.

  • On reports that she likes to garden naked: "It's true. It probably started when I was doing my garden the first time. I'd be out there, and it would be scorching hot, so I would take off all of my clothes and garden. And then I would jump in the pool and swim — and I always get in the pool naked, because why would you want to put on a bathing suit? . . . I don't want anybody to take a picture of me naked. But in my own home, in my garden, [nudity]'s OK."
  • On losing weight: "Diet first, exercise second. Exercise is fantastic, and when I need to be a certain way quickly, I amp up my exercise by walking the dogs and doing yoga."

What do you think about Silvertone's perspective? Are you interested in buying her book? If you've ever tried a vegan diet, tell me what you thought about how it affected your overall health below.

Source: WireImage