The Single Number That Tells You How Your Body Is Really Aging

27 Jun 2026 · 60 min
1:00:12

In this Ben Greenfield interview, former NFL player and multi‑sport athlete Jimmy St. Louis explains how his personal injury‑driven quest for faster recovery led to the creation of Agentis, a network of longevity clinics that aims to define a standard of care for the fragmented anti‑aging market. He walks through the clinic’s service “honeycomb” – hormone optimization, peptide stacks, advanced biologics (stem cells, exosomes), IV therapies, plasma exchange, and physical modalities such as red‑light, hyper‑baric, cryotherapy and ozone – and how Agentis acquires best‑in‑class locations, codifies their protocols with world‑class medical advisors, and disseminates them via a proprietary technology platform. A central piece of the patient journey is the Longevity Quotient (LQ), a 12‑15‑minute, five‑test battery (whole‑health questionnaire, COSAC‑17 cardiometabolic score, body‑composition, cognition test, grip strength) that feeds into a composite score and a 60‑marker blood panel broken into organ‑system cohorts. Jimmy describes his athletic background (cross‑country, football, rowing, CrossFit) and how injuries (multiple ACL tears) spurred his adoption of stem‑cell and peptide therapies. He also discusses the business’s growth from a spine‑surgery network to a 15‑clinic, multi‑state operation, its partnership with the Mayo Clinic, and the vision of a cash‑pay, affordable, data‑driven model that can be scaled while preserving clinic‑specific “flavor.” The conversation expands to cover the partnership with Ultrahuman, which provides an at‑home Blood Vision Panel that delivers lab results directly to the Agentis app, enabling seamless, wearable‑agnostic data aggregation. Jimmy highlights a home‑environment sensor that monitors CO₂, temperature and other factors to flag sleep disruptions and suggest simple interventions (e.g., opening a window), integrating those insights into the LQ dashboard. He outlines the onboarding flow where new patients complete the LQ, can opt‑in to the Ultrahuman service, and receive personalized protocol recommendations. Finally, Jimmy emphasizes outreach to physicians—offering a directory of Agentis locations and encouraging primary‑care or concierge doctors to adopt the Longevity Quotient framework—positioning the model as a tool to elevate standard care across the broader healthcare ecosystem.

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