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Boundless Life

Could ONE Score Reveal How Fast You’re Aging? The Longevity Quotient & How a Former NFL Player Is Redefining The Standards of Longevity Medicine, With Jimmy St. Louis

Boundless Life

Ben Greenfield

Self-improvement, Fitness, Education, Health & Fitness

4.65.3K Ratings

🗓️ 27 June 2026

⏱️ 76 minutes

🧾️ Download transcript

Summary

Full show notes: https://bengreenfieldlife.com/jimmypodcast 

In this episode with Jimmy St. Louis, you'll hear how a former NFL player, US Olympic rowing trials competitor, and four-time CrossFit regionals athlete built his career around defining the standard of care in longevity medicine. Jimmy shares the full arc of his path from a three-sport young athlete through three ACL tears, into a spine surgery business that performed 100,000 procedures, and then into Agentis Longevity, a company built around acquiring the best longevity clinics in the country and unifying them under one consistent set of protocols. You will also get a full breakdown of the Longevity Quotient, the five-test battery Agentis uses to score every new patient, and hear how Jimmy and I built a custom Agentis x Boundless protocol for my listeners.

Jimmy St. Louis is a healthcare entrepreneur, operator, and former elite athlete dedicated to driving the standard of personalized health, longevity, and regenerative medicine. He is the CEO of Agentis, a platform built to help people live healthier, happier, longer lives through best-in-class longevity treatments. He also serves as President of the Personalized Health Association, leading a national movement to advance regenerative and personalized healthcare through advocacy, education, and collaboration. A former NFL player and US Rowing Team member, Jimmy holds a B.S. in Business Administration, an MBA, and dual M.S. degrees in Finance and Telecommunications. 

Try the Agentis x Boundless Protocol

Book your LQ assessment, a $149 blood panel measuring over 60 biomarkers. Within five to seven days you'll get your Longevity Quotient, a single number from 0 to 99 quantifying how your body is aging compared to your peers, plus a personalized 12 week protocol built around your bloodwork. Labs can be drawn at home anywhere in the country or in-clinic at Arete in Nashville. No commitment to start, HSA/FSA eligible. 

Use code AGENTIS15 for 15% off at checkout.

Start your journey with Agentis Longevity here. 

Episode Sponsors:

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Young Goose: To experience the transformative power of Young Goose's cutting-edge skincare products, visit younggoose.com and use code BGF10 for 10% off your order.

See omnystudio.com/listener for privacy information.

Transcript

Click on a timestamp to play from that location

0:00.0

My name is Ben Greenfield and on this episode of the Boundless Life podcast.

0:05.0

Nobody had really defined the standard of care in the longevity space, but the consumer journey in my perspective is...

0:13.0

In this show, I interview Agentist founder Jimmy St. Louis in Nashville where I traveled to see some of the really cool things

0:24.0

that he's rolling out at longevity clinics around the country. Great athlete. Former NFL football

0:29.4

player, cross-country athletes, CrossFit competed pretty heavily in that. Rowing, and his story is

0:36.8

pretty inspiring. So how do you change health care?

0:39.6

How do you help advance healthier, happier lives, but do so by driving the standard of care,

0:44.2

like truly defining the standard of care and longevity health care. When people hear that, they think,

0:48.7

now tell me how you're doing that. What's the easiest, simplest solutions to help me embark on this journey?

0:54.8

Yeah.

0:55.2

All the show notes are going to be at Ben GreenfieldLife.com slash Jimmy podcast.

1:00.2

Let's go.

1:02.6

Welcome to The Boundless Life with me, your host, Ben Greenfield.

1:07.1

I'm a personal trainer, exercise physiologist, and nutritionist,

1:10.6

and I'm passionate about

1:11.9

helping you discover unparalleled levels of health, fitness, longevity, and beyond.

1:23.1

Here's the deal. If you're over 35 years old, which you might be, check your birthday,

1:27.4

check your passport, check your driver's license, your enzyme levels have started to go down. Enzymes are the workhorses of digestion. So this is a problem. They break down food into usable macro and micronutrients. And research has unfortunately shown that by the time someone hits 65, their salivary and pancreatic secretions, both of which are involved in

1:45.6

enzyme activity may have declined by as much as 50%. And that decline creates chronic indigestion,

1:51.3

setting the stage for gut issues and yeast and mold overgrowth and even malnutrition and

1:56.5

definitely not getting swollen muscles or recovering well. That's why I'm a fan of enzyme

2:00.2

supplementation.

...

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