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 Nicotinamide Riboside Is Doing Inside Your Retina eye health
May 26, 2026

What Nicotinamide Riboside Is Doing Inside Your Retina

You have probably heard that NR boosts NAD+ for energy and longevity. Here is what two new studies reveal about what it does specifically inside your retina.

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Air Pollution and Your Eyes: What a 441,000-Person Study Found Eye Health
May 19, 2026

Air Pollution and Your Eyes: What a 441,000-Person Study Found

Most people think of air pollution as a lung problem. New research tracking nearly half a million people over 14 years found it may also be quietly raising...

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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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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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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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Your Gut Bacteria May Be Affecting Your Vision Eye Health
March 25, 2026

Your Gut Bacteria May Be Affecting Your Vision

Researchers are uncovering a surprising connection between the bacteria in your gut and the health of your eyes. Here is what the science says so far.

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Can GLP-1 Drugs Like Ozempic Protect Your Optic Nerve? Eye Health
March 20, 2026

Can GLP-1 Drugs Like Ozempic Protect Your Optic Nerve?

Weight loss drugs are everywhere. But emerging research suggests GLP-1 drugs like semaglutide and liraglutide might do more than slim your waistline: they could protect the nerve cells...

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How to Protect Your Vision After 45: A Science-Based Supplement Guide Eye Health
March 09, 2026

How to Protect Your Vision After 45: A Science-Based Supplement Guide

As you reach your mid-40s, your eyes undergo changes that go beyond needing reading glasses. While presbyopia is common, more serious conditions like macular degeneration and glaucoma can...

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Why Mitochondrial Health Is the Key to Preventing Age-Related Eye Disease Eye Health
February 23, 2026

Why Mitochondrial Health Is the Key to Preventing Age-Related Eye Disease

Your retina is one of the most energy-hungry tissues in your body. While most eye health advice focuses on sunglasses and surface-level vitamins, the real battle against age-related...

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