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    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.

    All AMD Blue Light Dry Eye Eye Health Eye Health Supplements Eye Pressure (IOP) Ginkgo Glaucoma GLP-1 Longevity Lutein Macular Degeneration Mitochondria NAD+ Neuroprotection nicotinamide riboside Optic Nerve research retina Visual Field Progression Yamanaka Factors
    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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    NAD+ and Glaucoma: What New Research Reveals About Protecting Your Optic Nerve Eye Health
    February 11, 2026

    NAD+ and Glaucoma: What New Research Reveals About Protecting Your Optic Nerve

    Lowering eye pressure is the standard treatment for glaucoma, but for many, it isn't enough. Emerging research suggests that a decline in NAD+, a vital coenzyme for cellular...

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    NADefense

    Ophthalmologist-founded supplements designed to support long-term vision wellness through targeted cellular nutrition.

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    * These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Sight Guard is a dietary supplement. Consult your physician before starting any supplement regimen.

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