Nicotinamide adenine dinucleotide (NAD) is one of the most important and interesting molecules in the body.


Nicotinamide adenine nucleotide (NAD+) has emerged as a key regulator of cellular processes that control the body’s response to stress. NAD boosters, small molecules that raise NAD+ levels, are now considered to be highly promising for the treatment of multiple diseases and the potential extension of the human lifespan.

Nicotinamide adenine dinucleotide (NAD) is one of the most important and interesting molecules in the body. It is required for over 500 enzymatic reactions and plays key roles in the regulation of almost all major biological processes (Ansari and Raghava, 2010). Above all, it may allow us to lead healthier and longer lives. By modulating NAD+ sensing enzymes, it controls hundreds of critical processes from
energy metabolism to cell survival, rising and falling depending on food intake, exercise, and the time of day.

NAD+ levels steadily fall as we age, leading to a decline in the function of cells and organs. By raising NAD+, NAD+ boosters can have profound effects on the health and survival of mammals. Increases in NAD+ promote cognitive and sensory function, gluconeogenesis in the liver, lipogenesis in adipose tissue, insulin secretion in the pancreas, and insulin sensitivity in muscle. NAD+ also promotes endothelial cell proliferation and protects against cardio- and cerebrovascular disease. NAD regulates immune function and inflammation and protects against acute injury in the kidney. NAD promotes and extends fertility in both males and females, ostensibly by activation of sirtuins.

Physiological effects of NAD-boosting molecules

Liver Function: Key enzymes in NAD+ signaling pathways are known to protect the liver from fat accumulation, fibrosis, and insulin resistance, which are related to the development of fatty liver diseases, such as NAFLD and NASH.

Kidney Function: Several lines of evidence indicate that reduced levels of NAD+ in aged kidneys and a corresponding decrease in sirtuin activity are largely responsible for reduced kidney function and resilience with age (Ugur et al., 2015).

Skeletal Muscle Function: Old mice have increased markers of muscle atrophy and inflammation, as well as impaired insulin signaling and insulin-stimulated glucose uptake compared to young wild-type mice. Treatment of old mice with NAD+ precursors, such as NR and NMN, dramatically improves muscle function.

Cardiac Function: NAD+ levels are critical for normal heart function and recovery from injury.

Endothelial and Vascular Function: Cardiovascular and cerebrovascular diseases contribute to the greatest decline in quality of life after 65 and are directly responsible for about one-third of all deaths (Nichols et al., 2014; Ungvari et al., 2010).

DNA Repair and Cancer: Because NAD+ is involved in so many aspects of cancer biology, from mitochondrial activity to cell survival, there are a variety of ways it could be used in the clinic. The rationale for reducing NAD+ levels in tumors is that they will be less able to repair DNA damage, thereby increasing their sensitivity to chemotherapeutic agents.

Immunity and Inflammation: There is a growing body of evidence that NAD+ precursors can have anti-inflammatory effects.

Neuronal Function: The neuroprotective effects of NAD+ precursors were first revealed by a study of the middle cerebral artery (MCAO)-induced ischemia, where treatment with NAM reduced the extent of infarct in Wistar rats (Ayoub et al., 1999; Klaidman et al., 2003; Sadanaga Akiyoshi et al., 2003), a finding recently replicated by treatment with NMN (Wei et al., 2017a).

Aging and Longevity: Total NAD+ levels were once considered extremely stable. Recently, however, it has become clear that a steady decline in total NAD+ levels over time is a natural part of life for all species, from yeast to humans (Balan et al., 2008; Belenky et al., 2007; Lin et al., 2004; Massudi et al., 2012; Mouchiroud et al., 2013; Zhang et al., 2016; Zhu et al., 2015).


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