Here are six health and beauty rules Woodley has talked about over the years:

Eat clay.

“I first heard about the benefits of eating clay from a taxi driver,” Woodley explained. “He was African and was saying that, where he’s from, the women eat clay when they’re pregnant,” she told intothegloss.com. “I’ve discovered that clay is great for you because your body doesn’t absorb it, and it apparently provides a negative charge, so it bonds to negative isotopes. And, this is crazy: it also helps clean heavy metals out of your body.” Though she swears by it, health experts don’t recommend it—here’s why.

When you can, go makeup-free.

Though she often dresses up for appearances, Woodley revealed she’d prefer to go au natural. “I will get my makeup done for appearances and events,” she says. “Day-to-day, though, I don’t wear makeup at all.”

Ditch your shampoo bottle.

Woodley has her mom to thank for her low-maintenance hair. “I basically have horse hair. It’s so low-maintenance. The less I put in it, the better. When it was long, I used shampoo from Living Libations, but now it’s really short. I only shampoo it like once a month—the oilier, the better.”

Try oil pulling.

When discussing her all-natural routine, she recommends swishing with some sesame or coconut oil for a bright smile. “I love a natural way to heal. You can do something called ‘oil pulling’ where you swish coconut or sesame oil in your mouth when you wake up and spit it out. It’s amazing! It really makes your teeth whiter, because the plaque on your teeth is not water soluble, it’s fat-soluble. So the lipids have to dissolve in fats, which is why oil works in your mouth.”

Laugh out loud.

Woodley told People that the secret to great skin is to laugh it up. “I can tell you, all of my friends in their mid-thirties and early forties laugh a lot and have no wrinkles. That is the secret to good skin. I swear. Everybody has this big thing about chemicals and facials, but it is just laughter.”

When all else fails, make your own products.

Off screen, the Divergent star has been making her own soaps for years.“When I was 15 … I started studying indigenous peoples and their lifestyles because I was like ‘What does healthy mean?’ Part of that is just knowing what is in the products you use and the foods you eat — the happiness, being positive — it all contributes to it.”

Wash your face every night.

Woodley described her nightly face-washing ritual to Interview magazine as " grounding.” “To wash my face and nourish my skin and cleanse myself of everything that happened through the day, and then to sit in bed with my journal or a book of poems or a novel and a cup of tea, is the perfect way for me to ensure a good night’s rest.” Up next: Shailene Woodley Confirms She’s Engaged to Aaron Rodgers—Here’s How It Happened 

Shailene Woodley s Surprising Hair and Beauty Secrets   I Only Shampoo Once a Month  - 79