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 
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