What Is NAD+?

Nicotinamide adenine dinucleotide — NAD+ for short — is a coenzyme found in every living cell. It plays a critical role in energy metabolism, converting nutrients into cellular fuel. But its importance goes far beyond basic energy production.

NAD+ is essential for activating sirtuins, a family of proteins that regulate aging, inflammation, and stress resistance. It also supports PARP enzymes responsible for DNA repair — a process that becomes increasingly important as we age.

Why Levels Decline

By age 50, most people have roughly half the NAD+ levels they had in their 20s. This decline is associated with reduced mitochondrial function, increased oxidative stress, and the gradual onset of age-related conditions like cognitive decline, fatigue, and metabolic slowdown.

Factors that accelerate NAD+ depletion include chronic stress, poor sleep, excessive alcohol consumption, and sedentary lifestyle.

The Science of Supplementation

Research from institutions like Harvard Medical School and the National Institute on Aging has shown that boosting NAD+ levels can restore mitochondrial function and improve cellular health in animal models. Human clinical trials are ongoing, with promising early results in areas like cognitive function and physical endurance.

Nasal Spray Delivery

While oral NAD+ supplements exist, bioavailability is a concern — much of the molecule is broken down during digestion. Nasal spray delivery bypasses the GI tract, allowing NAD+ to enter the bloodstream more efficiently through the nasal mucosa.

Physician-prescribed NAD+ nasal sprays offer a controlled, consistent dose that's easy to self-administer at home. No needles, no infusion centers.

Who Should Consider NAD+?

NAD+ supplementation may benefit adults experiencing age-related fatigue, brain fog, or reduced recovery from physical activity. It's also popular among those interested in proactive longevity medicine — supporting the body's repair systems before symptoms appear.

As with any treatment, a physician consultation is essential to determine if NAD+ is appropriate for your health profile and goals.