CoQ10 (Ubiquinol) vs Quercetin
Heart vs Immune · evidence-backed comparison
- • CoQ10 (Ubiquinol) has the broader effect profile across the 9 effect categories.
- • Quercetin is cheaper per serving ($0.35 vs $0.90).
- • CoQ10 (Ubiquinol) has a slightly cleaner safety profile.
- • CoQ10 (Ubiquinol) has higher bioavailability (better absorption).
Side-by-side traits
| Trait | CoQ10 (Ubiquinol) | Quercetin |
|---|---|---|
Category | Heart | Immune |
Active compound | Ubiquinol (reduced form) | Quercetin |
Form available | Softgel, Capsule | Capsule, Tablet |
Source | synthetic | plant |
Typical dose | 100–200 mg daily | 500–1000 mg daily |
Dose range | 100–200 mg | 500–1000 mg |
Loading protocol | — | — |
Best taken with | fat-containing meal | vitamin C (potentiates) |
Best time of day | morning | any |
Bioavailability How efficiently the body absorbs and utilizes the compound. | High (4/5) | Low (2/5) |
Onset time | Cumulative: 4–12 weeks | Cumulative: 2–6 weeks |
Half-life | ~33 hours | ~17 hours |
Evidence level Quality and quantity of human research. | Moderate (some RCTs) | Moderate (some RCTs) |
Overall effect Subjective effect magnitude. | Moderate (3/5) | Low (2/5) |
Muscle / strength | Low (2/5) | Very Low (1/5) |
Physical energy | High (4/5) | Low (2/5) |
Focus / cognition | Low (2/5) | Very Low (1/5) |
Mood / stress | Low (2/5) | Very Low (1/5) |
Sleep quality | Very Low (1/5) | Very Low (1/5) |
Immunity | Low (2/5) | High (4/5) |
Recovery Post-exercise recovery support. | Moderate (3/5) | Moderate (3/5) |
Longevity / healthspan | High (4/5) | High (4/5) |
Safety rating 5 = exceptionally well-tolerated; 1 = significant risk profile. | Very High (5/5) | High (4/5) |
Price per serving Approximate USD per typical daily dose. | $0.90 | $0.35 |
Vegan friendly | Yes | Yes |
Gluten free | Yes | Yes |
3rd-party tested | Yes | Yes |
About CoQ10 (Ubiquinol)
Mitochondrial electron carrier depleted by statins, aging, and intense training. Ubiquinol is 3× more bioavailable than ubiquinone.
About Quercetin
Polyphenol with antihistamine and senolytic properties. Common in protocols for allergies and viral infections; pair with vitamin C.
Vetted brands, third-party testing, ships worldwide.
Vetted brands, third-party testing, ships worldwide.
CoQ10 (Ubiquinol) safety
Common side effects:
- • Generally none
- • Mild GI upset
Avoid if:
- • Warfarin (may reduce effect)
Drug interactions:
- • Warfarin
- • Blood pressure meds
- • Chemotherapy
Quercetin safety
Common side effects:
- • Headache
- • Tingling extremities (high doses)
Avoid if:
- • Kidney disease
Drug interactions:
- • Cyclosporine
- • Quinolone antibiotics
- • Anticoagulants
Common uses
- • Heart health
- • Statin side effects
- • Energy / fatigue
- • Migraine prevention
Stacks well with: pqq, Fish Oil (Omega-3 EPA/DHA)
Common uses
- • Seasonal allergies
- • Immune support
- • Senescent cell clearance
Stacks well with: Vitamin C, Zinc
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Medical disclaimer
SupplementDuel is for educational purposes only and is not medical advice. Consult a physician before starting, stopping, or combining supplements — especially if you are pregnant, breastfeeding, take prescription medication, or have a chronic condition.