Other compounds

PQQ

Also called: pyrroloquinoline quinone

A compound in some foods.

Why people take it
Energy, brain.
What the evidence says
Little evidence.
How it is usually taken
Usually 10 to 20 mg a day.
Be careful
Little safety data.
Medicines it can interact with
No important medicine interactions are known, but tell your doctor and pharmacist about every supplement you take.

Other other compounds

Alpha-lipoic acidResveratrolQuercetinPterostilbeneNMNSpermidineFisetinSulforaphaneDIMDHEAMelatoninCaffeine and L-theanineCannabidiol (CBD)Hemp seedBee pollenRoyal jellyPropolisManuka honeyChlorophyllWheatgrass

Common questions

What is PQQ?

A compound in some foods.

Why do people take PQQ?

Energy, brain.

Does PQQ work?

Little evidence.

How much PQQ do people take?

Usually 10 to 20 mg a day.

Is PQQ safe?

Little safety data.

Does PQQ interact with medicines?

No important medicine interactions are known, but tell your doctor and pharmacist about every supplement you take.

Sources and further reading

Last reviewed 31 October 2026. Written by Satya Babu.

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For information only, not medical advice. Supplements are not medicines: they are not tested and approved like drugs before they are sold, and they can interact with medicines. Talk to your doctor or pharmacist before you start one, especially if you are pregnant or breastfeeding, take regular medicines, or have kidney, liver or heart disease.