Is a 'light deficiency' quietly ageing you faster? – with Professor Glen Jeffery

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 More from Liz: Preorder Liz’s new book – How to Age A Better Second Half Follow Liz on Instagram Follow Liz Earle Wellbeing on Instagram Some links may be affiliate links, which help support the show at no extra cost to you. Read our Affiliate Policy for more information. Hosted on Acast. See acast.com/privacy for more information.

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Is a 'light deficiency' quietly ageing you faster? – with Professor Glen Jeffery is an episode from Wellness with Liz Earle by Liz Earle.

This episode is 52:18 long.

This episode was published on Mar 13, 2026.

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