PQQ (Pyrroloquinoline Quinone)

Mechanism of Action

PQQ activates PGC-1alpha via CREB phosphorylation, directly stimulating mitochondrial biogenesis — the formation of new mitochondria. It acts as a redox cycling agent capable of thousands of catalytic oxidation-reduction cycles (compared to ~4 for vitamin C), providing exceptional antioxidant capacity. PQQ also modulates NMDA receptor signaling and promotes nerve growth factor (NGF) synthesis, supporting neuronal health and cognitive function.

Dosing Protocol

Notes

Often stacked with CoQ10 as the 'mitochondrial stack' — PQQ creates new mitochondria, CoQ10 optimizes existing ones. Human trials show improvements in sleep quality, cognitive function, and CRP reduction. Dose-response appears to plateau around 20mg.

Stacking

• CoQ10
• NMN
• Alpha Lipoic Acid
• Omega-3

Interactions

• Redox-active supplements (high-dose vitamin C) [LOW] — Theoretical competition at redox cycling sites, but generally synergistic

Contraindications

• Pregnancy/lactation (insufficient safety data)

Side Effects

• Rare: headache
• Mild GI discomfort at higher doses
• Insomnia if taken late

Key Papers

• 10.1016/j.jnutbio.2012.11.018
• 10.1089/ars.2012.4985
• 10.1096/fj.05-5116fje

Source Quality

BioPQQ (Mitsubishi Gas Chemical) is the gold standard source — produced via bacterial fermentation. Avoid synthetic sources. Brands: Life Extension, Jarrow Formulas (both use BioPQQ).

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