Proof.Fit

Quercetin

19 benefits mapped to clinical evidence across supplements.

Benefit Evidence

Main Effects
Heart health

Lipids down: LDL/TC

Blood pressure/endothelial function up

Arrhythmia/ischemia reduced

Strong
1,454
Inflammation

CRP/IL-6↓

JAK/STAT, TNF-α↓

hs-CRP −0.23

Strong
1,846
Immune support

Inflammation/antiviral boost

Immune cells/antibodies

Strong
1,751
Metabolism

Lipids/fat oxidation

+45% MFO

Insulin/androgens/adipokines

Moderate
940
Antioxidant

Antioxidant ↑ +7 min

Oxidative stress ↓

Bioavailability ↑ 20-fold

Moderate
657
Blood circulation

Better vessel dilation

Lower blood pressure

Reduced clotting

Moderate
714
Healthy aging

Bone markers +2.7%

Inflammation/vascular aging

NAFLD liver fat −1.9%

Moderate
1,167
Skin health

Healing + elasticity

Acne + barrier

Wrinkles -7%

Moderate
422
Exercise recovery

less soreness, −5.5%

faster strength recovery, −10pp

better endurance, +3.9%

Moderate
232
Respiratory comfort

Respiratory relief, +symptoms

Faster lung recovery, inflammation

Fewer URTIs, allergies

Moderate
478
Joint comfort

Pain/function improved

Uric acid -26.5

Vitamin D +11.9

Moderate
250
Blood sugar

Postmeal glucose ↓

Insulin timing ↑

HOMA-IR ↓ 21%

Moderate
298
Allergy relief

Eye symptoms ↓, +55%

Rhinoconjunctivitis flare ↓, 46%

Weak
194
Digestive support

Gut barrier/permeability

Metabolite & absorption shifts

Weak
146
Liver support

ALT, liver fat -1.9%

Visceral fat, BMI

Weak
102
Energy & Fatigue

Endurance +3–13%

Strength +10%

Weak
68
Brain health

Reaction time improved

CBF trend only

Weak
80
Mental clarity

Faster reaction time

CBF trend, no change

Weak
80
Eye health

Eye symptoms ↓; -62.5%

Itching/congestion ↓; quercetin ↑

Weak
66