# PQQ Gold (Pyrroloquinoline quinone)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/pqq-gold
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-19
**Evidence Score:** 2 / 10
**Category:** Other
**Also Known As:** Pyrroloquinoline quinone, PQQ, 2,7,9-tricarboxy-1H-pyrrolo[2,3-f]quinoline-4,5-dione, Methoxatin, Coenzyme PQQ, PQQ disodium salt, 4,5-dihydro-4,5-dioxo-1H-pyrrolo[2,3-f]quinoline-2,7,9-tricarboxylic acid

## Overview

PQQ (Pyrroloquinoline quinone) is a redox cofactor that supports [mitochondrial biogenesis](/ingredients/condition/energy) and cellular energy production. The compound demonstrates [neuroprotective](/ingredients/condition/cognitive) properties through [antioxidant](/ingredients/condition/antioxidant) mechanisms and mitochondrial function enhancement.

## Health Benefits

• Neuroprotection against toxicity from 6-hydroxy[dopamine](/ingredients/condition/mood) and hypoxia/ischemia (demonstrated in preclinical models only)
• Potent [antioxidant activity](/ingredients/condition/antioxidant) through scavenging superoxide and peroxynitrite radicals (in vitro evidence)
• Stimulation of cell growth and proliferation in culture (cell culture studies only)
• Inhibition of α-synuclein amyloid fibril formation (in vitro evidence)
• Protection against oxidative stress-induced cell damage (preclinical evidence only)

## Mechanism of Action

PQQ functions as a redox cofactor that activates PGC-1α (peroxisome proliferator-activated receptor gamma coactivator 1-alpha), promoting [mitochondrial biogenesis](/ingredients/condition/energy) and improving cellular energy [metabolism](/ingredients/condition/weight-management). The compound scavenges superoxide and peroxynitrite radicals while protecting against [oxidative stress](/ingredients/condition/antioxidant) through its quinone structure. PQQ also modulates CREB signaling pathways and supports neuronal survival by protecting against excitotoxicity.

## Clinical Summary

Current evidence for PQQ is primarily limited to preclinical studies and cell culture models. Animal studies demonstrate neuroprotection against 6-hydroxy[dopamine](/ingredients/condition/mood) toxicity and hypoxia-ischemia injury in rodent models. In vitro research shows potent [antioxidant activity](/ingredients/condition/antioxidant) and stimulation of cell growth and proliferation. Human clinical trials are limited, with most evidence coming from small pilot studies examining [cognitive function](/ingredients/condition/cognitive) and [energy metabolism](/ingredients/condition/energy) outcomes.

## Nutritional Profile

PQQ (Pyrroloquinoline quinone) is a redox-active quinone cofactor and bioactive compound, not a traditional macronutrient or micronutrient. It is not a source of calories, protein, fat, carbohydrates, or fiber. Typical supplemental doses range from 10–20 mg per serving (standard commercial formulations), with research doses commonly at 20 mg/day in human studies. PQQ is classified as a quinone compound with the molecular formula C14H6N2O8 and molecular weight of 330.21 g/mol. It is found naturally in trace amounts in foods: highest concentrations reported in natto (~61 ng/g), green peppers (~28 ng/g), parsley (~17 ng/g), green tea (~4–5 ng/g), and human breast milk (~1.4–1.5 ng/mL). Dietary intake from food is estimated at approximately 0.1–1.0 mcg/day, far below supplemental levels. The 'Gold' designation in commercial formulations typically indicates a stabilized or enhanced-absorption form, often complexed with glycine or in disodium salt form (BioPQQ is a common branded ingredient produced via fermentation). Bioavailability: PQQ is well-absorbed orally in humans, with peak plasma concentrations reached within 1–2 hours post-ingestion; urinary recovery studies suggest meaningful systemic absorption at 20 mg doses. No significant vitamin, mineral, or fiber content is present in isolated PQQ supplement form.

## Dosage & Preparation

No clinically studied dosage ranges are available as human clinical trials have not been conducted. Commercial forms include PQQ disodium trihydrate and pentahydrate, but therapeutic doses have not been established. Consult a healthcare provider before starting any new supplement.

## Safety & Drug Interactions

PQQ appears generally well-tolerated in preliminary human studies, though comprehensive safety data is limited. No significant drug interactions have been documented, but theoretical interactions may exist with medications metabolized through oxidative pathways. Pregnant and breastfeeding women should avoid PQQ supplements due to insufficient safety data. Some users may experience mild gastrointestinal effects at higher doses above 20mg daily.

## Scientific Research

The research dossier explicitly notes the absence of human clinical trial data, RCTs, or meta-analyses for PQQ, with no PubMed PMIDs available for human studies. All current evidence comes from preclinical models including cell culture and animal studies demonstrating [antioxidant](/ingredients/condition/antioxidant) and [neuroprotective](/ingredients/condition/cognitive) properties.

## Historical & Cultural Context

PQQ has no documented traditional or historical use in any medicine system. It was first discovered in 1964 as a bacterial redox cofactor with no prior traditional applications noted.

## Synergistic Combinations

CoQ10, Alpha-lipoic acid, Vitamin E, [NAD+ precursor](/ingredients/condition/longevity)s, Resveratrol

## Frequently Asked Questions

### What is the optimal PQQ dosage for cognitive benefits?

Most human studies have used PQQ doses ranging from 10-20mg daily. Research suggests 20mg daily may provide optimal cognitive and mitochondrial support, though individual needs may vary.

### How long does PQQ take to show effects?

Preclinical studies suggest cellular changes may occur within hours, but noticeable cognitive effects in humans typically require 4-8 weeks of consistent supplementation. Mitochondrial adaptations develop gradually over several weeks.

### Can PQQ be taken with CoQ10 supplements?

PQQ and CoQ10 work synergistically in mitochondrial function, with some studies suggesting enhanced benefits when combined. No negative interactions have been reported between these two mitochondrial-supporting compounds.

### Does PQQ cross the blood-brain barrier?

Yes, PQQ can cross the blood-brain barrier, allowing it to directly support brain mitochondrial function and provide neuroprotective effects. This crossing ability is essential for its cognitive and neurological benefits.

### What foods naturally contain PQQ?

PQQ occurs naturally in fermented soybeans (natto), green tea, spinach, and human breast milk in small amounts. However, dietary sources provide much lower concentrations than supplements, typically requiring supplementation for therapeutic effects.

### Is PQQ safe to take during pregnancy or while breastfeeding?

There is insufficient clinical evidence regarding PQQ safety in pregnant or breastfeeding women, as human studies in these populations have not been conducted. Due to the lack of safety data, PQQ supplementation is generally not recommended during pregnancy or lactation without consulting a healthcare provider. If you are pregnant or breastfeeding, discuss PQQ use with your doctor before starting supplementation.

### Does PQQ interact with medications like antidepressants or blood thinners?

Limited clinical data exists on PQQ drug interactions, though its antioxidant properties theoretically could affect medications metabolized through oxidative pathways. PQQ may have mild anticoagulant properties based on preclinical research, warranting caution if combined with blood thinners like warfarin. Always inform your healthcare provider about PQQ supplementation if you take prescription medications, particularly neuropsychiatric or anticoagulant drugs.

### How does PQQ compare to CoQ10 for mitochondrial support and energy production?

Both PQQ and CoQ10 support mitochondrial function, but PQQ primarily stimulates mitochondrial biogenesis (creation of new mitochondria) while CoQ10 functions as an electron carrier in the energy production chain. PQQ has demonstrated neuroprotective effects in preclinical models, whereas CoQ10 has more extensive human clinical data for heart and muscle health. Some evidence suggests combining both ingredients may provide complementary mitochondrial benefits, though head-to-head human studies are limited.

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