Eat 5 Pounds A Day of Broccoli OR Do *This* (+ Get Microplastics Out of Tissue Fast?!) artwork

Eat 5 Pounds A Day of Broccoli OR Do *This* (+ Get Microplastics Out of Tissue Fast?!)

Boundless Life

June 13, 2026

Full show notes: https://bengreenfieldlife.
Speakers: Ben Greenfield, David Roberts, John Gildea
**Ben Greenfield** (0:00)
My name is Ben Greenfield, and on this episode of the Boundless Life podcast.

**David Roberts** (0:04)
Have you had the dreams recently?
And he's like silent, he's like, no way. That's this stuff. Users are definitely like, this is amazing.

**Ben Greenfield** (0:14)
I think just the whole science and the biological impact of this is something that deserves more exploration. I'm super curious about it. So walk me through the moment when you realized broccoli was gonna be your career.
Welcome to the Boundless Life with me, your host, Ben Greenfield. I'm a personal trainer, exercise physiologist and nutritionist, and I'm passionate about helping you discover unparalleled levels of health, fitness, longevity and beyond.
You might be familiar with my book, Boundless, Upgrade Your Brain, Optimize Your Body and Defy Aging. It got a little out of control writing it. The original manuscript is over 1500 pages. I got it down to like 700 pages, and released it several months ago, about a year ago, the fully updated version of Boundless, kind of like the Bible of biohacking, a cookbook for everything you'd ever want, hormones, gut, digestion, et cetera. And I realize it's a little bit intimidating to pick up and read. And here's why I'm telling you all of this. I am curious if you would like the audio book version of Boundless, like on Audible or elsewhere for you to download, listen to at your convenience, in the gym, on your commute, on your hike, while you're cleaning your kitchen, in the bathtub, taking a crap, I don't know, whenever you listen to an audio book. So anyways, if that is remotely interesting to you and you want me to make that audio book happen so that you can have it in your ears wherever you go, go to bengreenfieldlife.com/boundlessaudio, bengreenfieldlife.com/boundlessaudio, your opinion matters. My guests on today's show figured out how you could get a lot of the benefits of eating like five pounds of broccoli a day without actually eating five pounds of broccoli a day, plus a way to get rid of microplastics, not just in the gut, but in the tissue. And we go way beyond that. My first guest is David Roberts, who co-founded Mara Labs. They make supplements, including the world's first naturally stabilized sulforaphane supplement. If that was Greek, don't worry. You'll get it during today's show called Brock Elite. And my other guest is Dr. John Gildea, who advises David as the chief science officer and co-founder of Mara Labs. He studies cell resilience, detoxification, aging biology, and has a Ph.D. in molecular biology. And his research laid the foundation for this Brock Elite stuff, which I started taking about a month ago after digging into some of the research and had all sorts of questions for these guys. So all the show notes are at bengreenfieldlife.com/marapodcast.
Let's dive in. All right, you guys, are you ready to talk broccoli?

**David Roberts** (3:22)
Oh yeah, always.

**Ben Greenfield** (3:23)
Yes. I mean, obviously, well, maybe not obviously. I think the first time I heard about sulforaphane and all these antioxidants from broccoli was maybe Rhonda Patrick talking about frozen broccoli sprouts or something like that years ago that she would dump into her blender. And people talk about broccoli sprouts, broccoli seeds, but then a lot of it seems to be based around this compound sulforaphane. And I think just the whole science and the biological impact of this is something that deserves more exploration. I'm super curious about it. David, I mean, I met you, I think, somewhere, it was like a health event. And then later you're at an event at my house. I know you've been interested in broccoli for a while.
So walk me through the moment when you realized broccoli was going to be your career.

**David Roberts** (4:17)
Yeah, I mean, it came about from my wife's cancer journey. So she was diagnosed with breast cancer in 2012 and wanted to treat it integratively and wanted to look at the different phyto-molecules to take. And pretty early on, I met John and read about sulforaphane. And we ended up grabbing some of her cancer cells from her tumor and growing them in our lab and putting 60 different things on them, 60 different supplements. Sulforaphane was number three in directly killing her type of cancer. And I think that was when I knew it was important, but it wasn't until a couple of years later.
We actually grew lots of broccoli sprouts and I would juice them for Mara and she drank the juice almost daily. And then, but it's kind of a pain in the butt, right?

**Ben Greenfield** (5:18)
And Mara is your wife?

**David Roberts** (5:19)

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