PQQ and mitochondrial biogenesis

Medically reviewed by Hemal Patel, PhD, Professor of Anesthesiology at UC San Diego School of Medicine. UCSD profile.

PQQ, pyrroloquinoline quinone, has one of the more flattering reputations in the mitochondrial supplement world because it is often linked with mitochondrial biogenesis. That sounds impressive, and to be fair, it is a genuinely interesting idea. If a compound could encourage the creation of new mitochondria or support mitochondrial signalling in a useful way, people interested in energy, ageing, and resilience would reasonably pay attention.

The problem, as usual, is the gap between interesting biology and proved human benefit. PQQ is a real molecule with mechanistic interest. It is not yet a slam-dunk answer for low energy, fatigue, or healthy ageing. This article gives the sober version inside MeScreen's mitochondrial health cluster.

What PQQ is

PQQ is a redox-active compound found in small amounts in food and studied for its possible effects on mitochondrial function, oxidative stress, and cellular signalling. It is not a vitamin in the classic sense, though it sometimes gets described in ways that make it sound one step short of sacred. Its appeal comes from preclinical work suggesting it may influence pathways involved in mitochondrial biogenesis and protection from oxidative stress.

Why people talk about mitochondrial biogenesis

Mitochondrial biogenesis is the process by which the body creates new mitochondria. This matters because higher mitochondrial density and better mitochondrial quality are linked to improved metabolic function, exercise adaptation, and resilience. Exercise is the best-established stimulus here, particularly through signalling pathways that involve PGC-1α and related regulators.

PQQ enters the conversation because some preclinical studies suggest it may affect those signalling pathways or support mitochondrial content. That is enough to make researchers curious. It is not enough to assume a capsule can mimic the effects of training, sleep, and competent physiology.

What the evidence actually shows

Most of the more enthusiastic PQQ discussion rests on animal or cell data. Those studies are useful for hypothesis generation, but they do not guarantee robust human outcomes. Human trials exist, but they are relatively small and often focus on subjective outcomes such as fatigue or sleep quality rather than hard mitochondrial endpoints.

Some small studies suggest PQQ may influence markers related to inflammation or perceived fatigue. That is interesting. It is not the same as proving a major mitochondrial transformation. The cleaner conclusion is that PQQ deserves scientific interest, but not promotional overconfidence.

Who might be interested in PQQ

PQQ is mainly of interest to people already engaged with mitochondrial health, healthy ageing, or fatigue optimisation, especially if they are comparing several supplement options rather than expecting a single silver bullet. In that sense, it belongs alongside articles such as NAD and mitochondrial function, urolithin A and mitophagy, and mitochondrial supplements, what works?.

If someone has not yet addressed exercise, sleep, recovery, or metabolic basics, PQQ is unlikely to be the limiting factor. That is not anti-supplement bias. That is just systems thinking being rude to wishful thinking.

Common claims to handle carefully

You will often see PQQ described as if it directly creates mitochondria in a clinically meaningful way for anyone who buys enough capsules. That language overstates the evidence. The more defensible claim is that PQQ may influence pathways relevant to mitochondrial biogenesis and oxidative stress, with early but limited human data.

That may still be enough to justify trialling it in selected cases. It is not enough to treat it as settled science.

PQQ in supplement stacks

PQQ is often stacked with CoQ10, NAD precursors, or broader ‘cellular energy’ formulas. That can make conceptual sense because the compounds target different parts of the wider mitochondrial story. It also increases the risk that nobody knows which ingredient, if any, is doing anything meaningful. Stack culture tends to make bad scientists out of otherwise sensible adults.

If a supplement plan is being considered, it is usually better to think in terms of priorities, goals, and measurable context rather than assembling a biochemical football team and hoping for chemistry-based luck.

Bottom line

PQQ is a legitimate topic in mitochondrial biology because it may influence pathways linked to mitochondrial biogenesis and oxidative stress. That makes it scientifically interesting. It does not yet make it clinically decisive. For most people, the best framing is simple, PQQ may be a reasonable optional addition, but exercise, sleep, recovery, and better testing remain more important.

References

1. Chowanadisai W, et al. PQQ stimulates mitochondrial biogenesis through CREB phosphorylation and increased PGC-1α expression. Journal of Biological Chemistry.
2. Harris CB, et al. Clinical effects of PQQ supplementation on fatigue and sleep. Journal of Nutritional Biochemistry.
3. Stites T, et al. The nutrient redox factor PQQ and mitochondrial function. Nutrition Reviews.