Showdown: MOTS-c vs NAD+ — Two Routes to Cellular Energy

Mitochondria, the parts of the cell that produce energy, are one of the busiest areas of performance and longevity research. Two names now come up in almost every discussion: MOTS-c and NAD+.

Both are linked to cellular energy, metabolism and age-related decline, and they are often mentioned together. But one is a peptide made by the mitochondria and the other is a coenzyme the mitochondria depend on. This Showdown explains how they differ and why they are more complementary than competing.

All information is for educational and research purposes only.

MOTS-c — The Mitochondria's Own Messenger

What it is: MOTS-c is a 16-amino-acid peptide. Unusually, it is encoded by mitochondrial DNA, not the DNA in the cell nucleus. It was discovered in 2015 and belongs to a newly recognised class called mitochondrial-derived peptides.

How it works: the key study (Lee et al., 2015, Cell Metabolism) found that MOTS-c acts mainly on skeletal muscle. It disrupts a metabolic pathway called the folate cycle, and this switches on AMPK, the cell's main energy sensor. AMPK activation improves glucose uptake and shifts cells towards using fuel more efficiently. Later research showed that under metabolic stress, MOTS-c can move into the cell nucleus and help control gene expression.

What the research shows:

In mice on a high-fat diet, MOTS-c prevented diet-induced obesity and insulin resistance (Lee et al., 2015).
In humans, exercise raises MOTS-c levels in muscle and blood. In mice, MOTS-c treatment improved physical performance in young, middle-aged and older animals (Reynolds et al., 2021, Nature Communications).
Natural MOTS-c levels appear to fall with age.

Key research considerations: almost all of the functional research is in animals and cells. A modified version of MOTS-c has entered early-phase human trials for metabolic conditions, but MOTS-c itself has limited human data. For a full profile, see our earlier post, MOTS-c 10mg Peptide — The Metabolic Peptide on the Cutting Edge of Energy & Performance.

NAD+ — The Coenzyme Behind Everything

What it is: NAD+ (nicotinamide adenine dinucleotide) is a coenzyme found in every living cell. It is not a peptide or a hormone. It is a basic part of how cells work.

How it works: NAD+ has two big jobs:

Energy production: it carries electrons through glycolysis, the Krebs cycle and the mitochondrial electron transport chain. Without it, cells can't turn fuel into ATP.
Signalling and repair: it is used up by enzymes such as sirtuins (linked to metabolic regulation and ageing), PARPs (DNA repair) and CD38 (immune signalling).

What the research shows:

NAD+ levels fall with age in several tissues. Research has linked this partly to rising CD38 activity (Covarrubias et al., 2021).
In animal models, restoring NAD+ with its precursors, NR (nicotinamide riboside) and NMN (nicotinamide mononucleotide), has improved markers of mitochondrial function, metabolism and physical performance.
In humans, precursor studies consistently show higher blood NAD+ levels. The functional results have so far been more modest and mixed than the animal data.

Key research considerations: NAD+ is a relatively large molecule that the gut tends to break down before it can be absorbed. That's why delivery method matters in NAD+ research. Liposomal forms wrap the molecule in a protective fat-based layer, and injectable forms bypass the gut entirely. Much of the published human research has used precursors, not NAD+ itself.

Where They Meet

MOTS-c and NAD+ are closely linked biologically. MOTS-c activates AMPK, and AMPK activation has been shown to raise NAD+ levels in cells, which in turn activates the sirtuin SIRT1 (Cantó et al., 2009, Nature). So one acts as a signal and the other as the fuel and cofactor that the signal helps to increase. They sit at different points in the same energy network.

Side-by-Side Comparison

	MOTS-c	NAD+
What it is	16-amino-acid mitochondrial-derived peptide	Coenzyme found in every cell
Where it comes from	Encoded by mitochondrial DNA	Made from vitamin B3 forms and tryptophan
Primary role	Signalling molecule (AMPK activation, gene regulation)	Energy production cofactor and enzyme substrate
Main tissue focus in research	Skeletal muscle	Every tissue
Declines with age?	Evidence suggests yes	Yes, in several tissues
Human data	Limited	Extensive for precursors; developing for direct NAD+
Delivery considerations	Peptide, needs reconstitution	Absorption is the key issue, hence liposomal and injectable formats

Most targeted: MOTS-c. Its research focuses on muscle metabolism and insulin sensitivity.

Most fundamental: NAD+. Every cell uses it, and its role in energy production is well established.

Newest research area: MOTS-c. It was only discovered in 2015, and the field is moving quickly.

Which Fits Which Research Goal

Exercise capacity, muscle metabolism and insulin sensitivity: MOTS-c, given its focus on skeletal muscle and AMPK.
General cellular energy, DNA repair and ageing: NAD+, given its role in almost every metabolic and repair pathway.
The mitochondrial signalling network as a whole: the two together. Their AMPK and NAD+ link makes them a natural pair.

The Verdict

MOTS-c and NAD+ both target mitochondrial research from different directions. MOTS-c is a signal the mitochondria send out. NAD+ is the currency they run on. Neither replaces the other. The right focus depends on whether the research is about how cells sense energy or how they produce it.

Find out more about our MOTS-c peptide and our liposomal and injectable NAD+ formats on their product pages.