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Summary
Coenzyme Q10 (CoQ10) is a mitochondrial cofactor central to ATP production and antioxidant defense. In adults, supplementation can reduce fatigue and support cognitive performance indirectly via improved cellular energy, with stronger signals in low‑status or higher‑demand contexts.
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CoQ10 — Thorne

CoQ10
Supports cardiovascular and neurological health, cellular energy production, and healthy aging with well-absorbed CoQ10. NSF Certified for Sport®.
thorne.com
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Mental Clarity, Focus, and Energy
- Energy and fatigue: Multiple trials show reductions in fatigue and improved exercise or daily energy, especially with 100–200 mg/day.
- Cognition: Small studies suggest improvements in attention and processing speed in subsets; effects accrue over weeks and are not stimulant‑like.
- Moderators: Baseline CoQ10 status, dose, duration (≥8–12 weeks), and formulation (ubiquinol vs ubiquinone) influence outcomes.
Brain Health
- Mechanisms: Supports mitochondrial electron transport and acts as a lipid‑phase antioxidant, potentially reducing oxidative stress and improving neuronal energy availability.
- Human data: Benefits cluster around fatigue, mood, and attentional measures; disease‑modifying claims remain unproven.
Gut Health
- Generally well tolerated with minimal GI effects; absorption improves with fat‑containing meals.