Quercetin vs Valerian Root
Immune vs Sleep · evidence-backed comparison
- • Quercetin has the stronger evidence base (moderate (some rcts)).
- • Quercetin has the broader effect profile across the 9 effect categories.
- • Valerian Root is cheaper per serving ($0.20 vs $0.35).
- • Valerian Root has higher bioavailability (better absorption).
Side-by-side traits
| Trait | Quercetin | Valerian Root |
|---|---|---|
Category | Immune | Sleep |
Active compound | Quercetin | Valerenic acid |
Form available | Capsule, Tablet | Capsule, Liquid, Powder |
Source | plant | plant |
Typical dose | 500–1000 mg daily | 300–600 mg extract |
Dose range | 500–1000 mg | 300–600 mg |
Loading protocol | — | — |
Best taken with | vitamin C (potentiates) | 30–60 min before bed |
Best time of day | any | evening |
Bioavailability How efficiently the body absorbs and utilizes the compound. | Low (2/5) | Moderate (3/5) |
Onset time | Cumulative: 2–6 weeks | Cumulative: 2–4 weeks |
Half-life | ~17 hours | — |
Evidence level Quality and quantity of human research. | Moderate (some RCTs) | Limited (small studies) |
Overall effect Subjective effect magnitude. | Low (2/5) | Low (2/5) |
Muscle / strength | Very Low (1/5) | Very Low (1/5) |
Physical energy | Low (2/5) | Very Low (1/5) |
Focus / cognition | Very Low (1/5) | Very Low (1/5) |
Mood / stress | Very Low (1/5) | Moderate (3/5) |
Sleep quality | Very Low (1/5) | High (4/5) |
Immunity | High (4/5) | Very Low (1/5) |
Recovery Post-exercise recovery support. | Moderate (3/5) | Very Low (1/5) |
Longevity / healthspan | High (4/5) | Very Low (1/5) |
Safety rating 5 = exceptionally well-tolerated; 1 = significant risk profile. | High (4/5) | High (4/5) |
Price per serving Approximate USD per typical daily dose. | $0.35 | $0.20 |
Vegan friendly | Yes | Yes |
Gluten free | Yes | Yes |
3rd-party tested | Yes | Yes |
About Quercetin
Polyphenol with antihistamine and senolytic properties. Common in protocols for allergies and viral infections; pair with vitamin C.
About Valerian Root
Traditional sedative herb that interacts with GABA receptors. Effects build over 2–4 weeks; less acute than melatonin.
Vetted brands, third-party testing, ships worldwide.
Vetted brands, third-party testing, ships worldwide.
Quercetin safety
Common side effects:
- • Headache
- • Tingling extremities (high doses)
Avoid if:
- • Kidney disease
Drug interactions:
- • Cyclosporine
- • Quinolone antibiotics
- • Anticoagulants
Valerian Root safety
Common side effects:
- • Strong odor
- • Morning grogginess
- • Headache
Avoid if:
- • Liver disease
- • Surgery (2 weeks before)
Drug interactions:
- • Sedatives
- • Anesthetics
- • Alcohol
Common uses
- • Seasonal allergies
- • Immune support
- • Senescent cell clearance
Stacks well with: Vitamin C, Zinc
Common uses
- • Sleep
- • Anxiety
- • Restlessness
Stacks well with: Magnesium Glycinate
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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.