Dr. Jack Kreindler is a longevity doctor, technologist, and performance expert reshaping how we think about aging, health, and human flourishing.

With decades of experience treating founders, athletes, and critically ill patients, Jack brings a rare blend of scientific depth, clinical insight, and philosophical reflection to the conversation around longevity.

In this episode, we explore what truly matters when it comes to living longer - and better. From why VO2 Max may be your most important metric, to the dangers of chasing biohacks without meaning, Jack shares a grounded roadmap for extending your healthspan, avoiding the biggest risks, and building a life rooted in joy and resilience.

📌 Expect to learn:

Why halving your aging pace might only give you 10 more good years

The difference between healthspan vs lifespan—and why it matters

How VO2 Max may be the single best metric for longevity

Which tests matter most (and which are overhyped)

The risks of supplements like NAD+ and Rapamycin

Why modern longevity science still treats us like mice

How to build a joyful, meaningful life that medicine alone can't provide

The spiritual and philosophical side of longevity nobody talks about

⏱ Timestamps00:00 – Why listen to Dr. Jack on longevity?01:33 – The molecules and the meaning of medicine03:00 – Turning points: Pixar internship, Douglas Adams, extreme medicine10:46 – Healthspan vs lifespan: the real longevity conversation13:47 – What is a “longevity doctor”?18:35 – Can we really live to 120? Or is it lottery odds?22:00 – Asteroid avoidance: how to not die young25:41 – The 5 pillars of longevity exercise28:31 – VO2 Max: your most important longevity metric35:03 – Rapamycin, immune suppression, and lessons from Brian Johnson40:00 – The NAD+ craze and risks you don't hear about43:02 – Who can you actually trust in this space?46:09 – Dr. Jack’s philosophy on life, death, and legacy53:38 – A doctor's true role: part scientist, part philosopher, part priest56:45 – Music, meaning, and the power of neuroacoustics1:00:52 – What a longevity doctor will look like in 20301:02:47 – Peptides, stem cells, and why it’s okay to wait🎙 Hosted by Julian Issa

📸 Instagram: @thebeyondtomorrowpodcast

🌍 Website: www.beyondtomorrowpodcast.com

📩 Email: [email protected]

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