# PQQ Activ (Pyrroloquinoline quinone) **Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/pqq-activ **Data Source:** Hermetica Superfoods Ingredient Encyclopedia **Updated:** 2026-03-31 **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, Redox cofactor PQQ ## Overview Pyrroloquinoline quinone (PQQ) is a quinone compound that functions as a redox cofactor in bacterial enzymes and exhibits [antioxidant](/ingredients/condition/antioxidant) properties based on its chemical structure. Currently, no human clinical trials support health benefits, with available research limited to mechanistic studies on its role as a prosthetic group in bacterial dehydrogenases. ## Health Benefits • No clinical health benefits can be reported - the research dossier contains no human clinical trials or studies • The compound functions as a redox prosthetic group in bacterial dehydrogenases (mechanistic data only) • Acts as an [antioxidant](/ingredients/condition/antioxidant) based on its chemical structure (theoretical, no clinical evidence) • May facilitate electron transfer processes (demonstrated only in bacterial systems) • No evidence-based health claims can be made from the available research ## Mechanism of Action PQQ functions as a redox prosthetic group in bacterial dehydrogenases, facilitating electron transfer reactions in oxidative processes. The compound's quinone structure allows it to cycle between oxidized and reduced states, theoretically providing [antioxidant activity](/ingredients/condition/antioxidant) through electron donation. However, the specific molecular pathways and enzyme interactions in human physiology remain undefined due to lack of clinical research. ## Clinical Summary No human clinical trials or studies are available in the research dossier for PQQ, preventing any evidence-based health benefit claims. The existing research is limited to mechanistic data demonstrating its role in bacterial enzyme systems. Without human studies, dosing protocols, efficacy outcomes, and safety parameters cannot be established. The lack of clinical evidence represents a significant limitation in understanding PQQ's potential therapeutic applications. ## Nutritional Profile PQQ (Pyrroloquinoline quinone) is a redox-active ortho-quinone compound (molecular formula: C14H6N2O8, molecular weight: 330.21 g/mol), not a conventional macronutrient or micronutrient. It is classified as a quinone cofactor and is not synthesized endogenously in humans. Typical supplemental doses range from 10–20 mg per serving. PQQ is found in trace dietary amounts in foods: fermented soybeans (natto) ~61 ng/g, green tea ~30 ng/mL, human breast milk ~140–180 ng/mL, and most fruits/vegetables at 1–7 ng/g dry weight. It contains no caloric value, no fiber, no protein, and no conventional vitamin or mineral content. As a bioactive compound, its primary characterized property is its redox cycling capacity — it can undergo reversible two-electron reduction to its reduced form (PQQH2), enabling electron transfer. It is water-soluble, which theoretically supports intestinal absorption, though human bioavailability data from clinical studies is absent. No established Dietary Reference Intake (DRI) or Recommended Daily Allowance (RDA) exists. The compound is structurally distinct from B-vitamins despite occasional informal comparisons; it does not meet the clinical criteria for vitamin classification in humans. ## Dosage & Preparation No clinically studied dosage ranges are available in the research. No information on forms (extract, powder, standardized) or dosing protocols has been established through clinical research. Consult a healthcare provider before starting any new supplement. ## Safety & Drug Interactions Safety data for PQQ supplementation is insufficient due to the absence of human clinical trials in the available research. Potential side effects, appropriate dosing ranges, and contraindications cannot be determined without clinical study data. Drug interactions and effects during pregnancy or breastfeeding are unknown. Individuals considering PQQ supplementation should consult healthcare providers given the limited safety profile information. ## Scientific Research No human clinical trials, randomized controlled trials (RCTs), or meta-analyses for PQQ or PQQ Activ were found in the research dossier. The available research focuses solely on the compound's bacterial biosynthesis pathways and biochemical mechanisms in non-human systems. ## Historical & Cultural Context PQQ has no documented traditional or historical medicinal uses. It was discovered in 1964 as a bacterial redox cofactor, with no links to traditional medicine systems or cultural practices. ## Synergistic Combinations No synergistic ingredients identified due to lack of clinical research ## Frequently Asked Questions ### What is PQQ and how does it work? PQQ (pyrroloquinoline quinone) is a quinone compound that serves as a redox cofactor in bacterial dehydrogenase enzymes. It functions by cycling between oxidized and reduced states to facilitate electron transfer reactions, though its specific mechanisms in human physiology are not clinically established. ### Are there any proven health benefits of PQQ? Currently, no clinical health benefits can be reported for PQQ as the research dossier contains no human clinical trials or studies. Available evidence is limited to mechanistic data showing its role as a prosthetic group in bacterial enzymes and theoretical antioxidant properties based on chemical structure. ### What is the recommended dosage for PQQ supplements? No recommended dosage can be established for PQQ supplements due to the absence of human clinical trials. Without clinical study data, safe and effective dosing protocols have not been determined, making dosage recommendations impossible to provide. ### Can PQQ interact with medications? Potential drug interactions with PQQ are unknown due to lack of human clinical research. The absence of clinical trials means interaction profiles with medications, supplements, or health conditions have not been studied or established. ### Is PQQ safe for long-term use? The safety of long-term PQQ supplementation cannot be determined from available research, as no human clinical trials exist to establish safety parameters. Side effects, contraindications, and long-term effects remain unknown without clinical study data. ### What is the difference between PQQ Activ and other PQQ supplements on the market? PQQ Activ is a branded form of pyrroloquinoline quinone that may differ in manufacturing process, purity standards, or stabilization methods compared to generic PQQ ingredients. However, all PQQ supplements contain the same active compound, and efficacy differences between brands have not been established in human clinical studies. The 'Activ' designation is a proprietary trademark rather than an indication of superior biological activity in humans. ### Can I get PQQ from food sources, or do I need to supplement? PQQ is found in trace amounts in certain foods including noni fruit, kiwi fruit, papaya, and fermented foods like tempeh and miso, though the quantities are very small. Whether dietary PQQ intake provides meaningful biological effects has not been established through human clinical research. Most PQQ supplementation relies on synthesized or bacterial-derived forms rather than whole food sources due to the low concentrations naturally available. ### How strong is the clinical evidence supporting PQQ supplementation in humans? There are currently no published human clinical trials demonstrating health benefits from PQQ supplementation, making the evidence strength for human use very limited. Existing research is primarily mechanistic or conducted in bacterial and animal model systems, which cannot be directly extrapolated to human health outcomes. Any health claims about PQQ for humans remain theoretical and lack the clinical validation required for evidence-based recommendations. --- *Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com* *License: CC BY-NC-SA 4.0 — Attribution required. Commercial use: admin@hermeticasuperfoods.com*