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.

How to Protect Your Eyes From Summer Sun cataracts
June 22, 2026

How to Protect Your Eyes From Summer Sun

The summer sun does more to your eyes than you think. Here is a simple, evidence-based routine to protect your vision when you are outdoors.

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What Calcium Pyruvate Does for Your Eyes eye health
June 15, 2026

What Calcium Pyruvate Does for Your Eyes

Calcium pyruvate is one of Sight Guard's five ingredients, and one of the least talked about. Here is what the research shows about pyruvate and the energy-hungry retina.

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Your Body Clock and Your Eyes: How Circadian Disruption Affects Vision Eye Health
June 09, 2026

Your Body Clock and Your Eyes: How Circadian Disruption Affects Vision

Your eyes have their own circadian biology. New research reveals how disrupting your body clock, through shift work, late-night screens, or irregular sleep, affects your tear glands, eye...

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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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