Vision is an energy problem before it is anything else.
The retina runs on more energy per gram than almost any tissue in the body. Keep the fuel flowing and the cells keep working. That is the whole thesis behind Sight Guard.
How Sight Guard works.
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NAD⁺ declines with age
The body loses much of the NAD⁺ it had in youth. Every cell feels it, and the retina, among the most energy-hungry tissues you own, feels it early.
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Mitochondria slow down
NAD⁺ is the coenzyme that powers mitochondrial energy production. Less NAD⁺ means less ATP for the photoreceptors that turn light into sight.
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Sight Guard supplies the precursor
A targeted NAD⁺ precursor formula gives retinal cells the raw material to keep producing energy, upstream of the decline rather than downstream of the damage.
NAD⁺ falls on a schedule. Your eyes keep the same workload.
The decline is gradual, predictable, and quiet. The demand on photoreceptors never drops to match it. That widening gap is where age-related visual change begins.
Illustrative of published NAD⁺ decline curves; individual levels vary.
- NAD⁺Declines with ageNAD⁺ levels fall as we get older across many tissues.
- RetinaHigh energy tissueAmong the body's highest energy demand per gram. That is why NAD⁺ support matters for what you see.
- NowWhen to startCollege, your 30s, and every decade after. Start whenever you want proactive support.
You cannot out-supplement antioxidants if cells have no energy to run on. Start upstream.
The evidence behind each ingredient.
Research cited refers to individual ingredients and general NAD⁺ biology, not to Sight Guard as a finished product.
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Therapeutic Potential of NAD⁺-Boosting Molecules: The In Vivo Evidence
View study for Therapeutic Potential of NAD⁺-Boosting Molecules: The In Vivo Evidence (opens in a new tab) -
Nicotinamide riboside is uniquely and orally bioavailable in mice and humans
View study for Nicotinamide riboside is uniquely and orally bioavailable in mice and humans (opens in a new tab) -
Retinal energy metabolism in health and glaucoma
View study for Retinal energy metabolism in health and glaucoma (opens in a new tab) -
Dose-dependent response of serum lutein and macular pigment optical density to supplementation with lutein esters
View study for Dose-dependent response of serum lutein and macular pigment optical density to supplementation with lutein esters (opens in a new tab)
Antioxidants still matter. Sight Guard simply makes sure your cells have the energy to use them.
- Ophthalmologist-founded
- Evidence-informed
- Third-party tested