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evidence · mechanism · dose
Supplements/Compound

Ubiquinol (CoQ10)

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

Cardiovascular HealthEnergy ProductionHealthy Aging

Overview

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

Natural sources
    Common forms

      Forms & variants of Coenzyme Q10

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

      Parent
      Coenzyme Q10

      Mitochondrial electron carrier and lipid-soluble antioxidant.

      Ubiquinone (oxidized)
      Ubiquinone (CoQ10)

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

      Mechanism of action

      Already in reduced form — directly usable in the electron transport chain and as a lipid antioxidant.

      Pathways
      • · ETC complex I–III shuttle
      • · Lipid peroxidation defense

      Effects on the body

      Organ system effects

      Evidence-based benefits

      Higher plasma CoQ10 vs ubiquinone at equal dose in older adults

      Moderate evidence

      Improves heart failure outcomes (Q-SYMBIO)

      Moderate evidence

      Potential side effects

      Common
        Rare
          Serious

            Drug interactions

            No notable interactions reported.

            Supplement interactions

            Pairs well with

            None listed.

            Avoid combining with

            No specific avoidances listed.

            Dosing & bioavailability

            Typical dose
            100–200 mg
            Study range
            Up to 600 mg in HF
            With food?
            With fat

            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.

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            Ubiquinol (C…
            Amazon
            Wide selection · fast shipping
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            iHerb
            Global delivery · curated brands
            Compound
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            Thorne
            Practitioner-grade · NSF tested

            Scientific evidence (9)

            RCTJ Funct Foods · 2014

            Ubiquinol bioavailability vs ubiquinone in older adults

            Failla ML, et al.

            Crossover comparing ubiquinol and ubiquinone absorption.

            Key findings

            Ubiquinol produced higher plasma CoQ10 in subjects >50 y.

            Open study
            Systematic reviewPubMed (NLM) · 1970

            PubMed: Ubiquinol (CoQ10) — Higher plasma CoQ10 vs ubiquinone at equal dose in older adults

            Live PubMed search

            Live results for "Ubiquinol (CoQ10) Higher plasma CoQ10 vs ubiquinone at equal dose in older adults" across the PubMed/MEDLINE peer-reviewed index.

            Key findings

            Opens current human and preclinical literature matching Ubiquinol (CoQ10) and "Higher plasma CoQ10 vs ubiquinone at equal dose in older adults". Filter by RCT, meta-analysis, or year on the results page.

            Open study
            Systematic reviewPubMed (NLM) · 1970

            PubMed: Ubiquinol (CoQ10) — Improves heart failure outcomes

            Live PubMed search

            Live results for "Ubiquinol (CoQ10) Improves heart failure outcomes" across the PubMed/MEDLINE peer-reviewed index.

            Key findings

            Opens current human and preclinical literature matching Ubiquinol (CoQ10) and "Improves heart failure outcomes". Filter by RCT, meta-analysis, or year on the results page.

            Open study
            Systematic reviewPubMed (NLM) · 1970

            PubMed: Ubiquinol (CoQ10) — randomized controlled trial

            Live PubMed search

            Live results for "Ubiquinol (CoQ10) randomized controlled trial" across the PubMed/MEDLINE peer-reviewed index.

            Key findings

            Opens current human and preclinical literature matching Ubiquinol (CoQ10) and "randomized controlled trial". Filter by RCT, meta-analysis, or year on the results page.

            Open study
            Systematic reviewPubMed (NLM) · 1970

            PubMed: Ubiquinol (CoQ10) — meta-analysis

            Live PubMed search

            Live results for "Ubiquinol (CoQ10) meta-analysis" across the PubMed/MEDLINE peer-reviewed index.

            Key findings

            Opens current human and preclinical literature matching Ubiquinol (CoQ10) and "meta-analysis". Filter by RCT, meta-analysis, or year on the results page.

            Open study
            Systematic reviewPubMed (NLM) · 1970

            PubMed: Ubiquinol (CoQ10) — pharmacokinetics

            Live PubMed search

            Live results for "Ubiquinol (CoQ10) pharmacokinetics" across the PubMed/MEDLINE peer-reviewed index.

            Key findings

            Opens current human and preclinical literature matching Ubiquinol (CoQ10) and "pharmacokinetics". Filter by RCT, meta-analysis, or year on the results page.

            Open study
            Systematic reviewPubMed (NLM) · 1970

            PubMed: Ubiquinol (CoQ10) — safety adverse events

            Live PubMed search

            Live results for "Ubiquinol (CoQ10) safety adverse events" across the PubMed/MEDLINE peer-reviewed index.

            Key findings

            Opens current human and preclinical literature matching Ubiquinol (CoQ10) and "safety adverse events". Filter by RCT, meta-analysis, or year on the results page.

            Open study
            Systematic reviewPubMed (NLM) · 1970

            PubMed: Ubiquinol (CoQ10) — dose response

            Live PubMed search

            Live results for "Ubiquinol (CoQ10) dose response" across the PubMed/MEDLINE peer-reviewed index.

            Key findings

            Opens current human and preclinical literature matching Ubiquinol (CoQ10) and "dose response". Filter by RCT, meta-analysis, or year on the results page.

            Open study
            Systematic reviewGoogle Scholar · 1970

            Google Scholar: Ubiquinol (CoQ10) — clinical evidence

            Live Scholar search

            Cross-database citation index for Ubiquinol (CoQ10) 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.