🔑 Core Function

• Energy metabolism: Key electron carrier in the mitochondrial electron transport chain, driving ATP production.
• Antioxidant defence: Acts in lipid membranes, regenerates vitamin E, and helps protect cells from oxidative damage.

🧬 Family & Essentiality

🌿 Plain-Language Summary

CoQ10 is like the “spark plug” of mitochondria — helping turn food into energy. It also acts as a lipid antioxidant, reducing oxidative stress and supporting vitamin E recycling. Levels naturally decline with age, and certain medicines can lower production.

⚗️ Molecular & Chemical IDs

⚡ Functions

• Mitochondria: Transfers electrons from Complex I/II → Complex III in respiration.
• Antioxidant role: Neutralises lipid peroxyl radicals, regenerates vitamin E.
• Cellular support: Studied for endothelial function, sperm motility, and skin health.

🍽️ Absorption & Bioavailability

Enhanced by

• Taking with fat-containing meals
• Solubilised or nano-emulsified forms
• Ubiquinol formulations

Reduced by

• Poor-quality crystalline supplements
• Fasting or very low-fat diets

🇦🇺 Australian NRVs

No NRV (RDI/AI) is established for CoQ10 by NHMRC. Considered conditionally essential in some contexts.

🥩 Food Sources

• Richest: Organ meats (heart, liver, kidney), oily fish
• Others: Nuts, seeds, some vegetable oils

🧪 Testing & Monitoring

• Plasma CoQ10 testing available via specialist labs — mainly for research or mitochondrial disorders.
• Not a routine pathology test in Australia.

🔗 Interactions

• Statins: Reduce endogenous CoQ10 synthesis (shared mevalonate pathway).
• Anticoagulants: May interact (e.g., warfarin) — supplementation should be medically supervised.

📊 Evidence Snapshot

• 🔬✅ Established: Cofactor in mitochondrial energy production; lipid antioxidant.
• 🧪⚖️ Mixed outcomes: Supplementation benefits shown in some conditions (statin-associated muscle symptoms, male infertility, heart failure) but inconsistent in general populations.