CoQ10 (Coenzyme Q10)
Body function
Mitochondrial energy production; antioxidant protection; supports heart and muscle function
Daily requirement
No official RDA; typical dietary intake 3–6 mg/day; therapeutic doses of 100–200 mg/day are used under guidance
Deficiency signs
Fatigue, muscle pain or weakness, exercise intolerance; levels naturally decline with age
Excess risks
Generally well tolerated; mild GI upset at high doses; may reduce warfarin's effectiveness
At-risk groups
People on statin medications (which lower CoQ10 levels), older adults, those with certain heart conditions
Supplement forms
Ubiquinone, ubiquinol (better absorbed, especially for older adults)
Food sources
- Salmon (grilled) — ~0.9 mg CoQ10 per 140g fillet (food sources are generally low; organ meats are the richest dietary source)
Related symptoms
Educational information only — not medical advice. This content does not diagnose, treat, or replace consultation with a qualified healthcare professional. Always seek professional medical advice for symptoms, supplement use, or health concerns.