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evidence · mechanism · dose
Supplements/Compound

Coenzyme Q10

aka CoQ10 · Ubiquinone · Ubiquinol

Mitochondrial electron carrier and lipid-soluble antioxidant.

Cardiovascular HealthEnergy ProductionHealthy AgingAthletic Performance

Overview

Endogenously produced quinone required for the mitochondrial electron transport chain.

Natural sources
  • Organ meats
  • Fatty fish
  • Whole grains
Common forms
  • Ubiquinone (oxidized, stable)
  • Ubiquinol (reduced, better absorbed >50yo)

Forms & variants of Coenzyme Q10

Different chemical forms of Coenzyme Q10 behave differently. Browse each form's mechanism, bioavailability, and best-use context.

Ubiquinol (reduced)
Ubiquinol (CoQ10)

Reduced active form of CoQ10 — preferred in adults over 40 and those with statin-induced depletion.

Ubiquinone (oxidized)
Ubiquinone (CoQ10)

Standard oxidized CoQ10 — cheaper and effective in younger adults who can readily reduce it.

Mechanism of action

Shuttles electrons between complexes I/II and III of the ETC; regenerates vitamin E.

Pathways
  • · Mitochondrial ATP production
  • · Antioxidant recycling
Enzymes
  • · Complex I, II, III of ETC

Effects on the body

Supports
Mitochondrial ATP production
Decreases
Statin-induced myalgia

Organ system effects

Cardiovascular

Improves ejection fraction in HFrEF (modest).

Evidence-based benefits

Reduces statin-associated myalgia

Moderate evidence

Reduces cardiovascular mortality in HF (Q-SYMBIO)

Moderate evidence

Reduces migraine frequency

Moderate evidence

Potential side effects

Common
  • · Mild GI upset
Rare
  • · Insomnia if taken late
Serious

    Drug interactions

    Warfarin
    May reduce INR — monitor.
    moderate

    Safety & non-supplemental interactions

    Educational summary — always confirm with your clinician or pharmacist before starting, stopping, or combining with prescription therapy.

    Avoid / monitor with these medications
    • ·Warfarin (may reduce INR)
    • ·Antihypertensives (additive)
    • ·Chemotherapy (theoretical antioxidant interference)

    Supplement interactions

    Pairs well with
    • PQQ
      Mitochondrial biogenesis support.
    Avoid combining with

    No specific avoidances listed.

    Dosing & bioavailability

    Typical dose
    100–200 mg
    Study range
    100–400 mg
    Best form
    Ubiquinol if >50yo
    Timing
    With fatty meal
    With food?
    Yes (fat-dependent absorption)

    Where to buy

    Affiliate-style search links to reputable retailers. We don't endorse specific brands — verify third-party testing (USP, NSF, Informed Sport) before purchase.

    Compound
    Coenzyme Q10
    Amazon
    Wide selection · fast shipping
    Compound
    Coenzyme Q10
    iHerb
    Global delivery · curated brands
    Compound
    Coenzyme Q10
    Thorne
    Practitioner-grade · NSF tested

    Scientific evidence (10)

    RCTJACC Heart Failure · 2014

    Q-SYMBIO trial

    Mortensen SA, et al.

    RCT of 420 HF patients given 300 mg/d CoQ10.

    Key findings

    Reduced cardiovascular mortality by 43% over 2 years.

    Open study
    Systematic reviewPubMed (NLM) · 1970

    PubMed: Coenzyme Q10 — Reduces statin-associated myalgia

    Live PubMed search

    Live results for "Coenzyme Q10 Reduces statin-associated myalgia" across the PubMed/MEDLINE peer-reviewed index.

    Key findings

    Opens current human and preclinical literature matching Coenzyme Q10 and "Reduces statin-associated myalgia". Filter by RCT, meta-analysis, or year on the results page.

    Open study
    Systematic reviewPubMed (NLM) · 1970

    PubMed: Coenzyme Q10 — Reduces cardiovascular mortality in HF

    Live PubMed search

    Live results for "Coenzyme Q10 Reduces cardiovascular mortality in HF" across the PubMed/MEDLINE peer-reviewed index.

    Key findings

    Opens current human and preclinical literature matching Coenzyme Q10 and "Reduces cardiovascular mortality in HF". Filter by RCT, meta-analysis, or year on the results page.

    Open study
    Systematic reviewPubMed (NLM) · 1970

    PubMed: Coenzyme Q10 — Reduces migraine frequency

    Live PubMed search

    Live results for "Coenzyme Q10 Reduces migraine frequency" across the PubMed/MEDLINE peer-reviewed index.

    Key findings

    Opens current human and preclinical literature matching Coenzyme Q10 and "Reduces migraine frequency". Filter by RCT, meta-analysis, or year on the results page.

    Open study
    Systematic reviewPubMed (NLM) · 1970

    PubMed: Coenzyme Q10 — randomized controlled trial

    Live PubMed search

    Live results for "Coenzyme Q10 randomized controlled trial" across the PubMed/MEDLINE peer-reviewed index.

    Key findings

    Opens current human and preclinical literature matching Coenzyme Q10 and "randomized controlled trial". Filter by RCT, meta-analysis, or year on the results page.

    Open study
    Systematic reviewPubMed (NLM) · 1970

    PubMed: Coenzyme Q10 — meta-analysis

    Live PubMed search

    Live results for "Coenzyme Q10 meta-analysis" across the PubMed/MEDLINE peer-reviewed index.

    Key findings

    Opens current human and preclinical literature matching Coenzyme Q10 and "meta-analysis". Filter by RCT, meta-analysis, or year on the results page.

    Open study
    Systematic reviewPubMed (NLM) · 1970

    PubMed: Coenzyme Q10 — pharmacokinetics

    Live PubMed search

    Live results for "Coenzyme Q10 pharmacokinetics" across the PubMed/MEDLINE peer-reviewed index.

    Key findings

    Opens current human and preclinical literature matching Coenzyme Q10 and "pharmacokinetics". Filter by RCT, meta-analysis, or year on the results page.

    Open study
    Systematic reviewPubMed (NLM) · 1970

    PubMed: Coenzyme Q10 — safety adverse events

    Live PubMed search

    Live results for "Coenzyme Q10 safety adverse events" across the PubMed/MEDLINE peer-reviewed index.

    Key findings

    Opens current human and preclinical literature matching Coenzyme Q10 and "safety adverse events". Filter by RCT, meta-analysis, or year on the results page.

    Open study
    Systematic reviewPubMed (NLM) · 1970

    PubMed: Coenzyme Q10 — dose response

    Live PubMed search

    Live results for "Coenzyme Q10 dose response" across the PubMed/MEDLINE peer-reviewed index.

    Key findings

    Opens current human and preclinical literature matching Coenzyme Q10 and "dose response". Filter by RCT, meta-analysis, or year on the results page.

    Open study
    Systematic reviewGoogle Scholar · 1970

    Google Scholar: Coenzyme Q10 — clinical evidence

    Live Scholar search

    Cross-database citation index for Coenzyme Q10 as it relates to "clinical evidence".

    Key findings

    Includes preprints, theses, and journal articles. Useful for tracking citation counts and follow-on work.

    Open study
    Educational use only. This profile is not medical advice. Consult a qualified healthcare professional before starting any supplement, especially if you take prescription medication or have a chronic condition.