One of the most powerful tools for healthy ageing might be something you've barely thought about: light. Most of us spend the majority of our time under LED lighting that's stripped of the very wavelengths our bodies need to function well – and the impact on our metabolism, energy and long-term health is only just being understood.

Professor Glen Jeffery, neuroscientist at UCL's Institute of Ophthalmology, joins Liz to explain why a light deficiency could be quietly accelerating ageing, what it means for your mitochondria, and the simple changes – starting with your light bulbs – that could make a real difference to how you feel and age.

In this episode:

Why infrared light is the most overlooked wavelength for human health
How LED lighting creates a "light deficiency" – and why Glen calls it modern-day scurvy
The profound effect light has on your mitochondria and energy production
Why morning light matters
What the research really says about red light face masks and infrared saunas
How changing your light environment could help regulate blood sugar and metabolism
The simple practical changes to make at home – and why Glen's first recommendation is to get a dog

Links mentioned in the episode:

Anti blue light glasses

Get in touch with a question for Liz:

Email: podcast@lizearlewellbeing.com
WhatsApp: 07518 471 846