# BioActive PQQ (Pyrroloquinoline quinone)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/bioactive-pqq
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-29
**Evidence Score:** 2 / 10
**Category:** Other
**Also Known As:** Pyrroloquinoline quinone, PQQ, BioPQQ™, mnemoPQQ®, PQQ disodium salt, Methoxatin, 2,7,9-tricarboxy-1H-pyrrolo[2,3-f]quinoline-4,5-dione, Coenzyme PQQ

## Overview

Pyrroloquinoline quinone (PQQ) is a redox-active quinone cofactor that supports [mitochondrial biogenesis](/ingredients/condition/energy) and neuroprotection by activating PGC-1α and stimulating [nerve growth factor](/ingredients/condition/cognitive) (NGF) synthesis. Clinical research demonstrates measurable improvements in verbal memory, reaction time, and BDNF levels, making it a well-studied candidate for cognitive health supplementation.

## Health Benefits

• Enhances [cognitive function](/ingredients/condition/cognitive) and memory - RCT showed improvements in verbal memory, reaction time, and executive function (PMID: 34415830)
• Increases brain-derived neurotrophic factor (BDNF) - 6-week RCT in elderly with mild cognitive impairment showed significant BDNF elevation (P=0.01) (PMID: 38908296)
• Improves cerebral oxygenation - Clinical trial demonstrated increased brain oxygenation (P=0.005) and N-acetyl aspartate in multiple brain regions (PMID: 38908296)
• Reduces [inflammation](/ingredients/condition/inflammation) markers - Human study found reduced plasma C-reactive protein and IL-6 at 0.3 mg/kg daily dose (PMID: 24231099)
• Supports [mitochondrial biogenesis](/ingredients/condition/energy) - Activates PGC-1α and NRF pathways for enhanced cellular energy [metabolism](/ingredients/condition/weight-management) (PMIDs: 11541945, 39513102)

## Mechanism of Action

PQQ functions as a potent redox cofactor that activates the transcriptional coactivator PGC-1α, directly stimulating [mitochondrial biogenesis](/ingredients/condition/energy) and increasing mitochondrial density in neurons. It also inhibits overactivation of the NMDA receptor subtype, reducing excitotoxic calcium influx and protecting neuronal integrity under [oxidative stress](/ingredients/condition/antioxidant). Additionally, PQQ upregulates nerve growth factor (NGF) and brain-derived neurotrophic factor (BDNF) synthesis, supporting synaptic plasticity and [long-term potentiation](/ingredients/condition/cognitive) pathways critical for memory consolidation.

## Clinical Summary

A randomized controlled trial (PMID: 34415830) demonstrated that PQQ supplementation produced statistically significant improvements in verbal memory, reaction time, and executive function in healthy adults. A separate 6-week RCT in elderly participants with mild [cognitive](/ingredients/condition/cognitive) impairment showed significant elevation of BDNF levels (P=0.01, PMID: 38-partial), suggesting neurotrophin-mediated mechanisms underlie cognitive benefits. Most human trials use doses of 20 mg/day, with study durations ranging from 6 to 12 weeks and sample sizes generally between 40 and 90 participants. Overall evidence is promising but still limited in scale; larger phase III trials are needed before definitive efficacy claims can be made.

## Nutritional Profile

PQQ (Pyrroloquinoline quinone) is a redox-active tricyclic ortho-quinone compound, not a classical macronutrient or vitamin, but classified as a bioactive quinone cofactor. It is not synthesized endogenously in humans and must be obtained exogenously. Naturally occurring dietary concentrations are extremely low: fermented soybeans (natto) contain the highest known food source at approximately 61 ng/g; green tea ~30 ng/mL; human breast milk ~140-180 ng/mL; parsley ~32 ng/g; green pepper ~28 ng/g. Supplemental 'BioActive PQQ' is typically provided as PQQ disodium salt (BioPQQ®), the most studied form, at doses of 10–20 mg/day in clinical trials. It contains no meaningful macronutrients (protein, fat, carbohydrate), no fiber, and no classical vitamins or minerals at supplemental doses. Key bioactive properties derive from its quinone redox cycling capability, allowing it to perform thousands of electron transfer reactions per molecule — estimated at up to 20,000 catalytic cycles, far exceeding vitamin C (~4 cycles). Bioavailability: oral absorption of the disodium salt form is well-documented with peak plasma concentration (Cmax) reached within approximately 1–2 hours post-ingestion; urinary recovery studies confirm absorption is dose-proportional. It distributes to tissues including brain, liver, and heart. Half-life is approximately 1 hour in plasma, though tissue retention is longer. Co-administration with CoQ10 is common in formulations as synergistic [mitochondrial](/ingredients/condition/energy) support is theorized, though not yet fully quantified in combined pharmacokinetic studies.

## Dosage & Preparation

Clinically studied doses include 0.3 mg/kg body weight daily (~20-25 mg for a 70 kg adult) as powder form, and standardized disodium salt extracts (BioPQQ™, mnemoPQQ®) taken daily. Dihydrogen-PQQ (Alpha Hope®) was administered twice daily in [cognitive](/ingredients/condition/cognitive) impairment studies. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

PQQ is generally well tolerated at clinically studied doses of 20 mg/day, with no serious adverse events reported in human trials lasting up to 12 weeks. Minor side effects occasionally reported include transient headache and gastrointestinal discomfort at higher doses exceeding 20 mg/day. PQQ may theoretically interact with anticoagulants such as warfarin due to its quinone structure and vitamin K-like redox activity, warranting caution in patients on blood thinners. Safety data in pregnant or breastfeeding women is insufficient, and use is not recommended during pregnancy until further research is available.

## Scientific Research

Key human RCTs include a 6-week double-blind trial (n=34) in elderly with mild [cognitive](/ingredients/condition/cognitive) impairment showing BDNF elevation and improved ADAS-Cog scores (PMID: 38908296), and another RCT demonstrating significant improvements in Cognitrax composite memory and executive function with mnemoPQQ® (PMID: 34415830). A human study using 0.3 mg/kg daily for 76 hours reduced [inflammatory](/ingredients/condition/inflammation) markers and altered [mitochondrial](/ingredients/condition/energy)-related metabolites (PMID: 24231099).

## Historical & Cultural Context

PQQ has no documented historical use in traditional medicine systems such as Ayurveda or Traditional Chinese Medicine. As a modern discovery from bacterial sources, it lacks traditional applications and was first identified as a cofactor in methylotrophic bacteria.

## Synergistic Combinations

CoQ10, Alpha-lipoic acid, Resveratrol, [NAD+ precursor](/ingredients/condition/longevity)s, Acetyl-L-carnitine

## Frequently Asked Questions

### What is the recommended dosage of PQQ for cognitive benefits?

The most consistently studied dose in human RCTs is 20 mg of PQQ disodium salt per day, taken orally with food. Some preclinical studies explore higher doses, but 20 mg/day represents the current evidence-based standard for cognitive outcomes including memory and reaction time improvements.

### How long does it take for PQQ to work?

Clinical trials indicate measurable cognitive improvements typically emerge after 6 to 12 weeks of consistent daily supplementation at 20 mg. The 6-week RCT showing significant BDNF elevation (P=0.01) in elderly participants suggests neurotrophin changes can occur relatively early, though functional memory benefits may take longer to manifest.

### Can PQQ be taken with CoQ10?

PQQ and CoQ10 are frequently combined in commercial supplements because they act on complementary mitochondrial pathways — PQQ promotes mitochondrial biogenesis via PGC-1α activation while CoQ10 supports electron transport chain efficiency at complexes I and II. Preclinical studies suggest synergistic effects on energy metabolism, and the combination is generally considered safe, though direct human RCT data on the combination specifically is limited.

### Is PQQ a vitamin?

PQQ was historically proposed as a B-vitamin candidate (sometimes called vitamin B14) because it acts as a redox cofactor and is found in human breast milk and various foods, but it has not been officially classified as an essential vitamin by regulatory bodies. Current evidence indicates the body cannot synthesize PQQ endogenously in meaningful amounts, but a definitive essential dietary requirement has not been established.

### What foods naturally contain PQQ?

PQQ is found in trace amounts in a wide variety of foods, with the highest concentrations reported in fermented soybeans (natto, approximately 61 ng/g), green peppers, parsley, kiwi fruit, and human breast milk. However, dietary intake from food sources is estimated at only 0.1–1.0 mg/day, far below the 20 mg doses used in cognitive health clinical trials, making supplementation necessary to achieve studied effects.

### What is the clinical evidence for PQQ's effects on brain-derived neurotrophic factor (BDNF)?

A 6-week randomized controlled trial in elderly individuals with mild cognitive impairment demonstrated that PQQ supplementation produced significant elevation in BDNF levels (P=0.01), a protein crucial for neuroplasticity and cognitive function. BDNF plays a key role in supporting the growth, maintenance, and survival of neurons, making this finding particularly relevant for age-related cognitive decline. This mechanism suggests PQQ may support long-term brain health beyond immediate cognitive performance improvements.

### Who is most likely to benefit from PQQ supplementation?

PQQ appears most beneficial for older adults experiencing mild cognitive impairment and individuals seeking to enhance memory, reaction time, and executive function, as evidenced by clinical trials showing improvements in these areas. Those interested in neuroprotection and cerebral oxygenation optimization may also be good candidates for PQQ use. However, optimal candidate profiles should be discussed with a healthcare provider, particularly for individuals with existing neurological conditions.

### How does PQQ improve cerebral oxygenation and what does this mean for brain function?

Clinical trials have demonstrated that PQQ supplementation increases brain oxygenation, which is essential for optimal cognitive performance and neuroprotection. Improved cerebral blood flow and oxygen delivery support mitochondrial function and energy production in brain cells, potentially reducing neurological fatigue and supporting sustained mental performance. Better oxygenation may also contribute to the ingredient's observed benefits on memory, reaction time, and overall cognitive processing.

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*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
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