16 min watch
Feb 12, 2026
A Vision for Vision: From Irish Research to a Global Documentary
On The Chris Wolfe Podcast, Prof. John Nolan answers frequently asked questions about carotenoids delving into how macular pigment optical density (MPOD) is measured, the accuracy of skin carotenoid assessments, and why a reliable understanding of these biomarkers is essential. He clarifies that skin carotenoid levels correlate with MPOD by about 30–40%, debunks common misconceptions, and highlights the importance of rigorous, validated measurements in both clinical practice and supplement development
