We have more health information than any generation in history, yet lifespan has stalled and healthspan is shrinking. So what is health in 2026?

In this first episode of What Is Health, Oliver Barnett is joined by Lelani, naturopath, herbalist and nutritionist at the London Clinic of Nutrition, and Mark, who shares his journey from corporate life to years of travelling the world, a serious health breakdown, and the recovery that led him into the health industry. Together they unpack why modern life has become so disconnected from how we’re built to live, and what you can realistically do about it.

In this episode:

• Why light, screens and indoor living are such a problem for sleep, metabolism and insulin sensitivity
• Lifespan vs healthspan: why we’re living longer but sicker for longer
• How to cut through conflicting advice from influencers, biohackers and “experts” who all have something to sell
• Why real food is the foundation, including the ultra-processed food study that had participants eating 500 extra calories a day
• A simple challenge: one week of real food, nothing out of a packet
• Practical tips on steaming, water quality and what you cook with
• Why the healthcare system is built for acute care, not chronic health, and what the panel would change, from more time with patients to informed consent
• Mark’s “leaky bucket” and “operating system” analogies for why so many protocols and supplements fail to deliver lasting results

We can’t live in a bubble, but we can make better choices in the world we’re in.

The London Clinic of Nutrition has supported thousands of people to get to the root cause of their health concerns. If you’re in need of support, find the team at https://londonclinicofnutrition.co.uk/

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