Nicotinamide adenine dinucleotide — better known as NAD+ — is one of the most important molecules in the human body, yet most people have never heard of it. Found in every living cell, NAD+ is essential for energy production, DNA repair, and the regulation of hundreds of metabolic processes. The problem is that NAD+ levels decline significantly with age — by middle age, most adults have roughly half the NAD+ they had in their youth. This decline is now understood to be a major driver of aging and age-related disease.

What the Research Shows

Research from Harvard Medical School, the National Institutes of Health, and dozens of international institutions has established NAD+ as a central regulator of cellular health. Studies show that restoring NAD+ levels activates sirtuins (longevity proteins), improves mitochondrial function, enhances DNA repair mechanisms, and reduces systemic inflammation. A landmark study in Cell Metabolism demonstrated that boosting NAD+ in aging mice reversed several hallmarks of aging within weeks. Human clinical trials are now showing promising results for cognitive function, muscle endurance, and metabolic health.

Bottom line: NAD+ is a foundational molecule for healthy aging. Declining levels are linked to fatigue, cognitive fog, metabolic dysfunction, and accelerated aging. IV and subcutaneous NAD+ therapy is one of the most direct and effective ways to restore cellular function.

What This Means at TRIM FITT

At TRIM FITT, every protocol is built on peer-reviewed evidence. We offer NAD+ as subcutaneous injection and IV therapy, customized to each patient’s health goals. Book a consultation to find out which protocol is right for you.

Schedule Your TRIM FITT Consultation →

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Educational purposes only. Not medical advice. Consult with a TRIM FITT provider before starting any treatment.