What it is & primary uses
Pyrroloquinoline quinone is a redox compound studied in a small number of short, mostly industry-linked cognitive trials.
Main benefits
- Small trials report improvements in selected cognitive test scores
- No established clinical anti-aging or mitochondrial outcome
Studied protocols
Research doses are grouped by outcome. They describe study designs—not a personal prescription.
20–21.5 mg/day PQQ disodium salt
- Study duration
- 12 weeks
- Interpretation
- Several small Japanese trials report improvements on selected cognitive tests, but replication by independent groups and longer safety follow-up are lacking.
04Food sources & equivalents＋
Can food provide a studied amount?
PQQ has been detected in foods at trace and variable levels, but there is no validated ordinary serving that reproduces a 20 mg supplement dose.
Trace, analytically variable PQQ rather than a standardized disodium-salt dose
- How this was estimated
- No calculation is shown because historic food measurements are not sufficient for a reliable milligram-equivalent serving.
- Important limitation
- The presence of trace PQQ in food does not validate the efficacy of concentrated PQQ supplements or create a practical food replacement target.
Food equivalents compare ingredient mass using published composition values. They do not prove equal absorption, formulation, physiological effect, safety or personal need.
Source: Measured PQQ levels in foods ↗05How to take it for absorption & tolerance＋
With or without food
Cognitive trials administered a daily PQQ disodium-salt capsule but did not directly compare fed and fasted absorption or clinical effects.
- Practical approach
- Use a consistent daily schedule and follow the tested product label; take with food if that improves tolerance.
- Watch for
- Food-use GRAS correspondence does not establish efficacy, long-term safety or a required meal combination.
Meal guidance reflects human pharmacokinetic, clinical, official-label or evidence-review sources where available. A food pairing can change absorption or tolerability, but does not make a supplement necessary, effective or safe for every person.
Source: PQQ cognition trial in adults ↗06Supplement interaction check＋
An unlisted pair means no established pair-specific interaction was identified in this review—not proof that every dose, product or person is safe.
This is not proof that every dose, product or user context is safe. Medication and condition checks still apply.
07Research notes＋
Limited for cognition and insufficient for broad mitochondrial, energy or anti-aging claims. Human trials are small, short and mostly connected to ingredient manufacturers.
FDA GRAS correspondence concerns specified food uses and does not validate cognitive or disease claims. Most efficacy trials are small and commercially connected.
08Scientific references＋
Peer-reviewed human research and formal evidence reviews. Open each source to inspect the complete paper record.
PQQ disodium salt and cognitive function in older adults
Dose context: 21.5 mg/day for 12 weeks
Reported improvements across several cognitive domains; most authors had direct commercial affiliations and the sample was small.
PQQ and cognition in adults aged 20–65
Dose context: 20 mg/day for 12 weeks
Reported age-stratified improvements in selected cognitive outcomes; multiple authors were employed by the ingredient manufacturer.
FDA response to GRAS notice 625
Dose context: Up to 8 mg per serving in specified beverages; notice also described supplement use up to 20 mg/day
FDA had no questions about the notifier's food-use GRAS conclusion but explicitly did not make its own GRAS determination or evaluate health claims.
09Expert & media references＋
Podcast and practitioner statements are clearly separated from research. They may explain practice or emerging ideas, but do not prove efficacy.
Dose Radar will leave this lane empty rather than invent or infer a professional opinion.