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

Ben Greenfield

Jun 27, 2026

Episode description

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:

BIOptimizers Magnesium Breakthrough: Seven essential forms of magnesium to help you relax, unwind, and wake up refreshed. Go to bioptimizers.com/ben and use code ben15 for 15% off.

Pendulum: Metabolic Daily is

Mindsip insights from this episode:

Measure phase angle to assess cellular health and hydration

A body composition scan can measure your 'phase angle,' which indicates cellular health and hydration, with a higher angle suggesting better metabolic function.

#hydration

#metabolism

Monitor CO2 levels to enhance sleep quality

The Ultrahuman home device monitors environmental factors like CO2 levels, which can disrupt sleep, and provides simple actionable advice like cracking a window.

#device

#sleep

Regenerate ACL with stem cell joint injections

After two ACL surgeries, the guest avoided a third by using stem cell joint injections, which resulted in visible regeneration of the ligament on MRI scans.

#regeneration

#stem-cell

Choose Niagen IVs for instant energy boost

The guest prefers Niagen IVs over NAD+ IVs, finding they provide an almost immediate and noticeable increase in energy levels.

#energy

#NAD

Assess your health with 15-minute longevity quotient test

The 'Longevity Quotient' is a 15-minute battery of five tests, including grip strength and cognitive function, that creates a single, gamified health score.

#longevity

#testing

Standardize best practices in longevity clinic care

The company Agentis acquires best-in-class longevity clinics to decode their unique expertise and then standardizes these best practices across its entire network.

#longevity

Support metabolism and hunger regulation with Pendulum Metabolic Daily probiotic

The probiotic Pendulum Metabolic Daily is specifically designed to support the body's natural GLP-1 signaling in the gut to help regulate metabolism and hunger.

#GLP1

#probiotics

Utilize intraosseous needling to repair cartilage

A procedure called intraosseous needling involves drilling into bone surfaces, like aerating a lawn, and filling the holes with a stem cell matrix to repair cartilage.