NAD+

Not a peptide. Research only. Not a protocol.

Simple words

Your body uses two common kinds of building pieces.

Amino acids make peptides and proteins. A peptide is a short string of those pieces. Insulin is one.

Nucleotides are a different kind of piece. DNA is a long string of nucleotides. A dinucleotide is just two nucleotide pieces snapped together. “Di” means two.

NAD+ is one of those two-piece helpers. It is not a string of amino acids. So it is not a peptide. Same shelf. Different chemistry.

What it does

Every cell already makes NAD+. The parts of the cell that make energy (mitochondria) use it to pass electrons along, like handing a bucket in a line. That line ends in ATP — the small energy packet a cell spends to do work. If NAD+ is gone, that line stops.

People sell NAD+ vials and IV drips. Labs more often study the pieces used to rebuild it: NMN and NR. Swallowing NAD+ itself is a poor way to raise it. The gut and liver chew it up first.

What researchers studied

Shin-ichiro Imai and Leonard Guarente spent years on sirtuins. Those are proteins that need NAD+ to work. In 2000 they showed yeast Sir2 is an NAD-dependent enzyme tied to silencing and lifespan talk. Later reviews put NAD+ drop and sirtuin activity next to aging and metabolic disease. That is the academic story vendors compress into “NAD+ is anti-aging.”

The human work is mostly on the precursors, not on injecting NAD+ itself. Oral NAD+ is a poor way to raise the pool. Gut and liver chew it up.

Mihoko Yoshino, Jun Yoshino, Kathryn Mills, and Imai ran a 10-week NMN trial in postmenopausal women with prediabetes who were overweight. Muscle insulin sensitivity went up. That is a metabolic readout. It is not “reversed aging.”

Charles Brenner’s group worked on NR. Human NR studies show blood NAD+ can rise. What that does for disease is still being argued.

Papers

Imai, Armstrong, Kaeberlein, Guarente, 2000 — Yeast Sir2 needs NAD+. Nature.

Imai and Guarente, 2014 — Review: NAD+ and sirtuins in aging and disease. Trends in Cell Biology.

Yoshino, Baur, Imai, 2018 — Review of NMN and NR as NAD+ intermediates. Cell Metabolism.

Yoshino, Yoshino, Mills, Imai et al., 2021 — 10 weeks of NMN. Muscle insulin sensitivity rose in prediabetic women. Science.

What this is not

Not a peptide. Not a proven youth drug. Clinic NAD+ drips are not the same experiment as those NMN papers. This page does not tell you how much to take.

Back to the list · 5-Amino-1MQ also talks about NAD+ (it blocks an enzyme that spends nicotinamide).