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268 Prevent Macular Degeneration and Cognitive Decline: How Essential Carotenoids Protect Your Brain and Vision with Prof. John Nolan
What if essential carotenoid antioxidants you consume today, could protect your vision and cognitive functions now and in the future? In this episode, Professor John Nolan explains how specific carotenoids, lutein, zeaxanthin and meso-zeaxanthin play a critical role in protecting the retina and brain from oxidative stress, a key driver of damage and age-related decline. As a leading researcher in ocular and brain nutrition, he shares ground- breaking insights from clinical trials showing how targeted supplementation can improve visual function and support cognitive performance. Listeners will learn why prevention must begin early, how to identify effective nutritional strategies, and how to take control of long-term eye and brain health to extend their healthspan.Professor John Nolan is a full professor at South East Technological University in Waterford, Ireland, where he holds the Howard Chair in Human Nutrition. He is a nutritional biochemist specializing in the role of carotenoids in vision and cognitive health. As Director of the Nutrition Research Centre Ireland he has led major international clinical trials, including the CREST studies,  published over 100 peer-reviewed scientific papers, and is founder and chair of the International Brain and Ocular Nutrition Conference. His research focuses on targeted nutrition to prevent and manage age-related diseases such as macular degeneration and Alzheimer’s disease, advancing evidence-based nutritional strategies to support lifelong eye and brain health.  Episode Timeline  00:00 – Welcome and introduction  04:25 – Origins of carotenoid research and macular degeneration  Early work identifying nutrition as a key modifiable risk factor  09:30 – What carotenoids are and why they matter  Role as antioxidants and “internal sunscreen” for the eye  13:55 – Can macular degeneration be reversed or improved  Distinguishing regeneration, slowing progression, and functional improvement  17:30 – Brain and eye connection  How nutrition may reactivate neural pathways and support cognition  20:27 – Challenging the current medical model  Why prevention must replace late-stage intervention  25:16 – The importance of meso-zeaxanthin  Why some individuals cannot convert nutrients effectively  28:37 – Supplement quality and evidence-based formulations  Risks of unregulated supplements and importance of clinical validation  32:18 – Nutrition, lifestyle, and informed decision-making  Why education and professional guidance are essential  33:21 – Starting early for lifelong protection  “From the cradle to the dance floor” approach to nutrition  35:55 – Declining nutrient density in modern food  Why diet alone may no longer be sufficient  37:18 – Wrap-up and key takeaways  Connect with the research of Prof John Nolan https://profjohnnolan.com Instagram: https://www.instagram.com/profjohnnolan/ LinkedIn: https://www.linkedin.com/in/johnmnolan/ Facebook: https://www.facebook.com/profjohnnolan/ Upcoming Vision for Vision documentary (watch the trailer )   Calls to Action :   Join the Growing Older Living Younger Community   Connect with Dr. Gillian Lockitch at https://www.askdrgill.com/ or email: askdrgill@gmail.com for a personal consult Download Guide to Nature's Colorful Antioxidants 2026  Subscribe to Growing Older Living Younger on your favorite podcast platform and leave a review to help others discover the show.  
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