In 1958, Jack Preiss and Philip Handler published a scientific paper describing how NAD+ was made from niacin in three steps.(1) This pathway was later named the Preiss-Handler pathway after the co-discoverers. It describes the enzyme steps needed to convert niacin into the NAD+ molecule.
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The salvage pathway is used to produce NAD+ from nicotinamide molecules. Whether the source of the nicotinamide is vitamin B3 (as niacinamide), newer nicotinamides (e.g., nicotinamide riboside [NR], nicotinamide mononucleotide [NMN]), or molecules in food that get broken down during digestion into nicotinamide, the salvage pathway turns them into NAD+ in our tissues.
Most organisms have several alternatives for producing the NAD+ molecule. In humans, there are three major NAD+ biosynthesis pathways: the De Novo Pathway, starting from the essential amino acid L-tryptophan; the Preiss-Handler pathway, using niacin (nicotinic acid); and the Salvage Pathway from niacinamide (nicotinamide). In this article, we’ll be covering the De Novo Pathway.
Any way we can boost mitochondria helps us to increase the longevity of our cells and support energy production. In this article, we explore lifestyle habits that improve mitochondrial health and support healthy aging.
Any way we can boost mitochondria helps us to increase the longevity of our cells and support energy production. Here we explore temperature and light therapy to improve mitochondrial health and support healthy aging.
In this article we’ll be covering the “big picture” when it comes to NAD. We’ll be doing a deeper dive on specific topics we introduce in this article in subsequent articles in this series. As you go through this series of articles please keep in mind that, like other molecules in the body, NAD+ is a means to an end. We don’t care about NAD+ on its own; we care about it because of what it allows cells to do.
In Silicon Valley, the hub of anti-aging research and funding, countless entrepreneurs and high-profile celebrities use fasting to combat the effects of aging. In Anti-Aging Benefits of Fasting, we will explore the mechanisms that create these fasting benefits. This part is more scientific than the others, but we emphasize only crucial components in an easily digestible format.
