NAD+

What Is NAD+?

NAD+ (Nicotinamide Adenine Dinucleotide) is a coenzyme found in every cell of every living organism. It functions as an electron carrier in the mitochondrial electron transport chain — the fundamental process by which cells convert nutrients into ATP (cellular energy). Beyond energy metabolism, NAD+ serves as a substrate for several critical enzyme families including sirtuins (longevity proteins), PARP enzymes (DNA repair), and CD38 (immune regulation).

NAD+ levels decline dramatically with age — studies show approximately 50% reduction by age 60 compared to young adult levels. This decline is now understood to be a primary driver of the mitochondrial dysfunction, reduced DNA repair capacity, and metabolic deterioration associated with aging.

Mechanism of Action

• Mitochondrial electron transport: NAD+ accepts electrons during glycolysis and the citric acid cycle, delivering them to the electron transport chain for ATP production — the fundamental energy currency of the cell
• Sirtuin activation: Sirtuins (SIRT1-7) are NAD+-dependent enzymes that regulate gene expression, stress responses, inflammation and metabolism — often called longevity proteins. NAD+ is their essential substrate
• PARP activation: PARP enzymes use NAD+ to detect and repair DNA strand breaks — critical for genomic stability and cancer prevention
• CD38 regulation: CD38 is the primary NAD+-consuming enzyme in the body — its activity increases with age and inflammation, contributing to NAD+ decline

SubQ vs Oral Administration

Oral NAD+ precursors (NMN, NR) have significant bioavailability limitations — much of the compound is degraded before reaching systemic circulation. Subcutaneous NAD+ injection bypasses gastrointestinal degradation, delivering the compound directly into circulation with significantly higher bioavailability. IV NAD+ infusions (used clinically for addiction treatment and neurological conditions) provide 100% bioavailability but require clinical administration.

SubQ injection represents the optimal balance of bioavailability and practicality for research applications — significantly superior to oral forms while accessible outside clinical settings.

Research Findings

Human clinical trials have demonstrated NAD+ supplementation improves muscle function and energy metabolism in older adults, reduces inflammatory markers, improves insulin sensitivity, and supports cardiovascular function. In neurological research, NAD+ has shown neuroprotective effects and improvement in cognitive function in several human studies.

The synergy with SS-31 and MOTS-c creates a comprehensive mitochondrial support stack — SS-31 addresses structural membrane integrity, MOTS-c provides upstream metabolic signalling, and NAD+ provides the electron transport substrate that all three mechanisms ultimately depend on.

Safety Profile

NAD+ has an excellent safety profile. Common transient effects include flushing, warmth and mild nausea at higher doses — these typically resolve within minutes and are more common with IV administration than SubQ. No serious adverse effects have been documented at therapeutic doses in published clinical trials. NAD+ is a naturally occurring molecule present in all cells.