A new health documentary follows an Irish scientist’s two-decade quest to prove that nutrition affects vision and brain health in ways we’ve barely begun to understand.

“A Vision for Vision,” directed by two-time Emmy winner Wayne Chesler, tracks Professor John Nolan’s research into carotenoids, the plant-based pigments found in marigolds, eyes, and the brain. The film spans locations from marigold fields in Mexico to research labs in Ireland, omega-3-rich waters off Norway, and elite performance centers in Singapore.

Nolan, who founded and directs the Nutrition Research Centre Ireland, has spent over 20 years studying how targeted nutrition might support vision, memory, and aging. His recent trials, including the re-MIND, CARES Trial 2, and CREST AMD studies, found that supplements combining carotenoids, omega-3 fatty acids, and vitamin E showed positive effects on Alzheimer’s symptoms, improved working memory in healthy adults, and better visual performance in patients with early macular degeneration.

The doc arrives as conversations around preventative health gain traction. Nolan’s pitch is straightforward: aging happens, disease doesn’t have to, and earlier intervention through nutrition could change outcomes.

The film drops on digital and VOD November 3. For indie filmmakers covering health and science, it’s a reminder that some of the most compelling stories live in labs, not studios.