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Antioxidant · in-depth review

Pyrroloquinoline Quinone (PQQ)

Pyrroloquinoline Quinone (PQQ)

Pyrroloquinoline quinone is a quinone redox cofactor. Natto, kiwi, and leafy greens contain traces of it; cells use it to drive mitochondrial biogenesis and to cycle between oxidized and reduced states.

Also known asPQQPyrroloquinoline quinoneMethoxatin
Related symptomsFatigueBrain fogMemory declineDifficulty falling asleep

Eases daytime fatigue

It can activate transcriptional paths such as PGC-1α, pushing mitochondrial biogenesis so cells have more respiratory units for energy. Fermented soy, kiwi, and leafy greens only supply traces. People who feel drained by day and want to start from mitochondria more often notice energy and subjective fatigue change after several continuous weeks.

Improve sleep quality

Adult studies in Japan have watched ease of falling asleep, sleep depth, and how refreshed people feel on waking; the mechanism still sits in mitochondrial redox and cellular energy. People who wake at night and still feel tired in the morning more often see differences on sleep questionnaires and daytime alertness with continued use.

Support working memory and focus

Small human studies have looked at attention, visuospatial, and short-term memory tasks; when mitochondria are better supplied, neuronal energy delivery is steadier. People who process information for long stretches and feel their thinking is slow more often see change in task performance or subjective clarity only after several continuous weeks.

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With foodCan be taken with or after meals
Best timeMorning or midday; evening is fine when the aim is sleep

Use it consistently first, then reassess based on how you feel and your nutrient needs.

General wellnessTypical daily intake for general wellness: often 10–20 mg
Specific needsNo official UL; EU novel-food use commonly caps around 20 mg per day. Adult supplementation should not exceed about 20–40 mg long term without medical advice.

How oftenGenerally use daily as directed on the product label.

Cautions

If you are pregnant, breastfeeding, or taking medicines, consult a doctor first. Long-term very high-dose human data are limited.

Common side effects

· Mild gastrointestinal discomfort or an unfamiliar taste may occur.

Rare but important

· Some people may have allergic reactions or interactions with medicines.

Long-term dependenceNo typical addiction evidence; do not exceed labeled amounts on your own long term.

Medical disclaimerThis page is compiled by the HerbBB editorial team for general health information only. It is not a substitute for advice from a doctor, pharmacist, or other qualified clinician. If you have a health condition, take medicines, or are pregnant or breastfeeding, speak with a professional first.