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About

An entrepreneur who engineers health.

Leonard Rinser. Munich-based. I work at the intersection of AI, longevity, and preventive health, building the systems, ventures, and tools I want to use on myself.

Leonard Rinser, Founder, The Health Guy

Founder

Two health companies in metabolic health and longevity diagnostics

Builder

The Health Guy · AI Health Toolkit

Writer

The Health Upgrade Newsletter

Speaker

Longevity, AI, Preventive Health

The Story

Three chapters, one throughline.

N° 01

Origin.

I started as an entrepreneur in healthcare and life sciences. For years I've worked at the edge of technology transfer and research, building ventures that turn scientific breakthroughs into real companies. The deeper I went, the clearer it became: the most leveraged problem of the next decade isn't software. It's human biology, the operating system everything else runs on.

N° 02

Method.

I read the science, then test it on myself. Wearables track the baseline. Blood panels confirm the direction. AI compresses thousands of papers into protocols I can actually run. What survives the cycle gets written down. What doesn't gets buried.

N° 03

Mission.

Translate the frontier of longevity research into systems anyone can use. Build the AI tools that make personalized health a default, not a luxury. Make preventive medicine boring through repetition, and help organizations bring this to the people who work for them.

Credentials

Across 30+ countries, with the institutions building the future of health.

Ventures

Supported 100+ companies in health and life sciences, from early-stage longevity startups to spinouts of major research institutes.

Research

Supporting spinouts of Europe's biggest research institutes, including Fraunhofer, Max Planck Society, Life Science Factory and teams from Helmholtz, in health and life sciences.

Clinical

Advisor to a leading German clinic working on integrative and preventive medicine approaches.

Network

Global Health & Life Science Executive at Sigma Squared Society, a network of fellows across 35+ countries building in health, science, and frontier technology.

Working Principle

"Health is the only compounding asset where the interest is paid in decades. Engineer it like one."

Leonard Rinser

Continue

Read the framework I run on myself.