Martha Stewart is living her her best life at 77. She's got a successful collection on QVC, loves being in the outdoors, and is basically best friends with Snoop Dogg.

So, how exactly does Stewart do it all? Although she does credit regular exercise and good genes for helping her age so gracefully, she also says her diet has played a big role in keeping her on the go.

Here's a closer look at four of Stewart's healthy-eating habits:

1. She drinks green juice every morning.

Although few things in the super-busy media maven's life remain constant, Stewart's breakfast routine is unwavering: "I drink green juice every single morning," she told Dr. Oz on his show last year.

preview for Dr. Oz and Martha Stewart on How She Prevents Aging With a Healthy Lifestyle

In 2014, Stewart shared her favorite recipe with TODAY, so you can sip on the same exact concoction. And if you really want to emulate Stewart's anti-aging a.m. routine, you can try treating yourself to some special skincare: She told Dr. Oz that she uses a hydrating mask on her face, décolletage, and hands every day after she wakes up.

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2. She keeps a garden where she grows her own organic veggies.

When it comes to produce, Stewart keeps things super-fresh and hyperlocal. So local, in fact, that she grows most of the veggies she eats. "I make [my green juice] out of vegetables that I grow," Stewart explained to Dr. Oz. "I grow in the greenhouse in the winter and the garden in the summer. And they're organic vegetables."

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3. She sticks with fish for the most part.

These days, Stewart gets most of her protein from seafood. "I eat well," she told Dr. Oz. "I don't eat a lot of meat — more of a fish-based diet."

And science backs up Stewart's decision to go semi-pescatarian — the popular Mediterranean diet, which includes eating more fish and less red meat, has been found to help with weight loss, increase "good" cholesterol, improve brain health and lower risk for heart disease.

4. She opts for nontraditional flours.

You didn't think Stewart would leave out her best baking tips, did you? The pastry pro revealed to Dr. Oz that she's recently started experimenting with alternatives to regular white flour, opting instead for other varieties that have more nutritional value.

"I think that we've become very reliant on the soft, white flours, which are not necessarily the most nutritional, the healthiest, the best for you. So we've done a lot of experimentation," she explained. "You can search for the best ingredients, and there are so many small mills that are really grinding up some really great flours these days."

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Martha Stewart (8) 6-oz Atlantic Salmon Filets w/ Butter
Martha Stewart (8) 6-oz Atlantic Salmon Filets w/ Butter
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Martha Stewart 2-lbs Holiday Peppermint Bark
Martha Stewart 2-lbs Holiday Peppermint Bark
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Martha Stewart 2-lbs Cashew Kettle Corn Brittle in Tin
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Martha Stewart Wine 3 bottles Fall Wine Set Auto-Delivery
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Heather Finn
Content Strategy Editor

Heather Finn is the content strategy editor at Good Housekeeping, where she heads up the brand's social media strategy and covers entertainment news on everything from ABC's 'The Good Doctor' to Netflix's latest true crime documentaries.