Dr Ash Kapoor, founder of Levitas Group, spoke on Sunday 13 September 2026 at the sixth Health Optimisation Summit, held at the Business Design Centre, London. He shared the programme with speakers including Wim Hof, Bear Grylls, Ben Greenfield, Dr Tara Swart and Dr Louise Newson.
“Energy Plasticity: Thinking beyond the cell to the fuel it runs on”
Longevity medicine often focuses on the cell itself. Dr Kapoor’s talk looked one step further back, at the fuel the cell runs on. Energy plasticity is the body’s ability to switch between glucose, fatty acids and ketones as needed. When it is preserved, cells are protected from metabolic stress, inflammation and premature ageing. When it is lost, the result is fatigue, poor recovery, weight gain and accelerated decline.presentation examined the science underpinning testosterone replacement therapy, the role of other key male hormones, and important considerations surrounding fertility preservation and reproductive health.
The talk covered:
Fuel flexibility as a foundation of healthy ageing
Why the body loses the ability to switch fuels
How fuel choice affects inflammation, hormones and cognition
Restoring energy plasticity through nutrition, movement, fasting windows and targeted support
