PlainPill

PQQ

People mainly take PQQ for energy, performance, sleep. Based on 66 first-hand reports and 0 meta-analyses & systematic reviews in the medical literature. Ranked #381 of 1,974 overall.

31
User score
Mostly positive
20% positive5% mixed3% negative73% unclear

Of reports that state an outcome, 71% are positive.

Clinical research
BModerate research base
0
meta-analyses
8
RCTs
1,198
papers

What PQQ does, according to users

Of the people who reported each effect, the share who said it got better.

What the research says

Systematic reviews and meta-analyses from PubMed, with their published conclusions.

BModerate research base

At least one meta-analysis, or 5+ randomized controlled trials. The grade measures how much human research exists — read the conclusions below for what it found.

No meta-analyses or systematic reviews published yet — 8 randomized trials found.

Dosage people report

As stated by users — not a recommendation. Follow the label or your doctor.

20 mgevery other day in morning
dailyas reported
every other dayas reported
20 mgdaily
5-fold higher than recommendedas reported
5 mgdaily

Reported side effects

How often each side effect came up across all reports.

anxiety ×2renal inflammation ×1malaise ×1insomnia ×1

What users say

Verbatim quotes, shortened only — each links to the original discussion.

Other options for energy

User data from public discussions; research from PubMed. Information only, not medical advice — talk to a doctor before starting, stopping or combining anything. Data updated October 2, 2026. How we rate