One of the biggest breakthroughs in longevity science over the past decade involves nicotinamide adenine dinucleotide (NAD+) and its relationship with sirtuin enzymes. These pathways control everything from DNA repair to mitochondrial function — and they decline significantly with age.

One of the biggest breakthroughs in longevity science over the past decade involves nicotinamide adenine dinucleotide (NAD+) and its relationship with sirtuin enzymes. These pathways control everything from DNA repair to mitochondrial function — and they decline significantly with age.

The Role of NAD+ in Cellular Metabolism

NAD+ is a coenzyme in redox reactions — it accepts electrons forming NADH, which is critical for cellular respiration. Without NAD+, cells cannot extract energy from food. Sirtuins are a class of NAD+-dependent protein deacetylases that regulate multiple cellular processes.

In mammals, seven known sirtuins (SIRT1-7) have been identified, with different cellular locations and functions. SIRT1 in the nucleus regulates gene expression and DNA repair. SIRT3 in mitochondria supports metabolic function and antioxidant defence. SIRT6 is involved in DNA repair and genomic stability.

How NAD+ Declines With Age

At age 40, you have approximately half the NAD+ you had at 20. By 60, this number may drop to a quarter. This decline is not incidental — it is a central mechanism of ageing. By reducing NAD+, we simultaneously reduce sirtuin activity, impairing cellular repair and mitochondrial function.

Factors contributing to NAD+ decline include chronic inflammation, poor sleep, highly processed food diets, and sedentary lifestyle. All of these accelerate sirtuin function decline.

NMN and NAD+ Precursors

Nicotinamide mononucleotide (NMN) and nicotinamide riboside (NR) are direct precursors to NAD+, showing promising results in preclinical studies. These molecules are small enough to be taken up by cells and converted to NAD+.

Research on the effects of NAD+ enhancement strategies on human longevity is ongoing. To date, data suggest NAD+ levels can be effectively raised, but whether this translates to meaningful health improvements is still being established.

MetaboDrop and Cellular Metabolism Support

MetaboDrop’s formulation targets core mechanisms of cellular metabolism health. While NAD+ enhancement is a complex topic, strategies that support overall mitochondrial function and cellular metabolism are aligned with long-term metabolic health goals.