The NADefense Blog

Learn More About Vision Wellness

Plain-English guides on eye health, the science behind our ingredients, and how to have better conversations with your ophthalmologist.

What Ginkgo Biloba Actually Does for Your Eyes Ginkgo
May 07, 2026

What Ginkgo Biloba Actually Does for Your Eyes

You have seen it on supplement labels. But what does ginkgo biloba actually do for your eyes? Here is what the science says.

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Why Your Eye Doctor Might Prescribe a Walk Eye Health
April 27, 2026

Why Your Eye Doctor Might Prescribe a Walk

Most glaucoma patients focus on drops and monitoring. But a 2025 study found that 10,000 steps a day is linked to significantly better blood flow to the optic...

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Dry Eye's Hidden Cause: Your Cellular Cleanup System Dry Eye
April 27, 2026

Dry Eye's Hidden Cause: Your Cellular Cleanup System

Most dry eye treatments address symptoms. A 2025 study reveals the root cause may be inside your tear glands, where a cellular process called autophagy has broken down.

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The Eye Nutrient Scientists Found Fighting Cancer Cells
April 23, 2026

The Eye Nutrient Scientists Found Fighting Cancer Cells

Zeaxanthin protects the center of your retina from light damage. Researchers just found it does something completely different inside the immune system.

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Sleep Apnea and Glaucoma: What the Science Shows Glaucoma
April 20, 2026

Sleep Apnea and Glaucoma: What the Science Shows

Thirty million Americans have sleep apnea. A growing body of research links repeated overnight oxygen drops to optic nerve damage. Here is what the evidence says and what...

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A 400-Year-Old Shark May Be Teaching Us Something About Eye Aging Eye Health
April 17, 2026

A 400-Year-Old Shark May Be Teaching Us Something About Eye Aging

Greenland sharks can live more than 400 years. A new study looked at how their retinas stay functional that long. The findings point back to pathways we already...

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Lutein Is in Your Eyes. It Is Also in Your Brain. Blue Light
April 15, 2026

Lutein Is in Your Eyes. It Is Also in Your Brain.

Lutein concentrates in both your retina and your brain. Here is what the research says about how it supports vision and cognition, and how much you actually need.

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Oculomics: How AI Eye Scans Can Detect Heart Disease, Alzheimer's, and More Eye Health
April 13, 2026

Oculomics: How AI Eye Scans Can Detect Heart Disease, Alzheimer's, and More

Imagine going to your eye doctor for a routine vision check, only to walk out with actionable health information about your cardiovascular system, cognitive decline, or kidney function....

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It Is Not Your Screen. What Is Really Driving Nearsightedness. Blue Light
April 09, 2026

It Is Not Your Screen. What Is Really Driving Nearsightedness.

A February 2026 study from SUNY College of Optometry proposes myopia is driven by prolonged close-up focus in dim indoor lighting, not screens or blue light. Learn what...

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