Collective Insights Blog

 How is NAD+ Made? Preiss-Handler Pathway

How is NAD+ Made? Preiss-Handler Pathway

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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Ashwagandha: Sources and Benefits

Ashwagandha: Sources and Benefits

Ashwagandha is an Ayurvedic herb often referred to as “Indian ginseng.” Within this system of it was classified as a general tonic and strength promoting. Its uses included infusing energy and vigor in circumstances characterized by exhaustion or a lack of physical energy. 

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How is NAD+ Made? Salvage Pathway

How is NAD+ Made? Salvage Pathway

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.

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How is NAD+ Made? De Novo Synthesis

How is NAD+ Made? De Novo Synthesis

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.

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