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Published on: 5/5/2026
Consulting a doctor before starting PQQ allows you to tailor dosing (often 10–20 mg daily), choose a reputable supplement, and monitor for side effects or interactions.
There are several important factors to consider such as timing, potential sleep impacts and lifestyle integration; see below for complete guidance.
Pyrroloquinoline quinone (PQQ) is a nutrient found in foods and supplements that has drawn attention for its potential to boost PQQ and cognitive speed. While research is ongoing, early studies suggest PQQ may support mitochondrial health, energy production, and mental processing. Below, we outline what you need to know, including how to work with a doctor to use PQQ safely and effectively.
PQQ (pyrroloquinoline quinone) is a small molecule that:
In supplement form, PQQ is typically synthesized and sold in doses ranging from 10–40 mg per day.
Healthy mitochondria produce the energy (ATP) your brain cells need to process information quickly. PQQ appears to:
Antioxidant properties help shield brain cells from free radicals, potentially preserving cognitive function as you age.
Preliminary animal studies show PQQ may influence neurotransmitter levels (e.g., dopamine, glutamate) involved in attention and reaction time.
Taken together, these mechanisms could translate into measurable improvements in PQQ and cognitive speed, such as faster reaction times, sharper focus, and clearer thinking.
Before starting PQQ—or any supplement—talk to your doctor, especially if you have existing health conditions or take medications. Your healthcare provider can help you:
If you're experiencing unusual symptoms or want to better understand your cognitive health concerns before your appointment, try Ubie's free Medically approved LLM Symptom Checker Chat Bot to help identify what might be going on.
While optimal dosing is still under study, typical recommendations are:
Best practices:
Always follow your doctor's guidance. Do not exceed your healthcare provider's recommended dose.
PQQ is generally well tolerated but may cause:
Potential interactions:
Do not take PQQ if you are pregnant or breastfeeding without medical supervision. Children and adolescents should only use PQQ under a pediatrician's care.
PQQ works best when combined with other habits that support cognition:
Keep a simple journal to track changes in:
Share these notes with your doctor during follow-up visits to fine-tune your plan.
If you experience any of the following, contact your doctor immediately:
And remember: always speak to a doctor about any symptoms that could be life threatening or serious.
PQQ shows promise for enhancing cognitive speed by supporting mitochondrial function, reducing oxidative stress, and protecting neurons. To use PQQ safely and effectively:
Finally, if you ever feel a new or severe symptom, or have concerns about your health, speak to a doctor right away.
(References)
* Nakano, M., et al. Pyrroloquinoline quinone-rich fermented soybeans improve cognitive function: A randomized, double-blind, placebo-controlled trial. Food Sci Nutr. 2022 Sep;10(9):3195-3203. doi: 10.1002/fsn3.2917. PMID: 35921200.
* Nakano, M., et al. A randomized controlled trial of the effect of pyrroloquinoline quinone and coenzyme Q10 on the cognitive functions of healthy adults. J Clin Biochem Nutr. 2013 May;52(3):141-9. doi: 10.3164/jcbn.12-68. Epub 2013 Mar 19. PMID: 23746618.
* Hwang, H., et al. Effects of Pyrroloquinoline Quinone (PQQ) Supplementation on Cognitive Function: A Comprehensive Review of Human Studies. Nutrients. 2020 Oct 30;12(11):3338. doi: 10.3390/nu12113338. PMID: 33132717. PMCID: PMC7692296.
* Maeda, H., et al. PQQ-containing fermented soybeans improves neuro-cognitive function in healthy elderly adults. Neurophysiology. 2018 May;50(3):218-223. doi: 10.1007/s11059-018-0639-6. PMID: 29961138.
* Xu, M., et al. The Effects of Pyrroloquinoline Quinone (PQQ) Supplementation on Cognitive Function: A Systematic Review of Preclinical and Clinical Studies. Nutrients. 2024 Jan 31;16(3):400. doi: 10.3390/nu16030400. PMID: 38341646. PMCID: PMC10857321.
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