Evidence supporting the use of: Quercetin
For the health condition: Cholesterol (high)

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Synopsis

Source of validity: Scientific
Rating (out of 5): 2

Quercetin, a flavonoid found in many fruits and vegetables, has been investigated for its potential effects on cholesterol levels. Several preclinical studies have demonstrated that quercetin supplementation can reduce total cholesterol, LDL ("bad") cholesterol, and triglycerides in animal models, likely due to its antioxidant and anti-inflammatory properties. Proposed mechanisms include inhibition of lipid peroxidation and modulation of enzymes involved in cholesterol metabolism.

In humans, the evidence is more limited and somewhat inconsistent. A few small randomized controlled trials (RCTs) suggest that quercetin supplementation (typically 500-1000 mg/day) may result in modest reductions in total and LDL cholesterol, particularly in overweight or obese individuals. A 2020 meta-analysis of RCTs found a small but statistically significant effect of quercetin on lowering total cholesterol, though the clinical significance is debatable and the effect size is less pronounced than with standard lipid-lowering medications.

While quercetin shows promise and is sometimes marketed for cholesterol management, mainstream clinical guidelines do not currently recommend its use for this purpose. More large-scale, high-quality human studies are needed to confirm its efficacy and safety for managing high cholesterol. Therefore, while there is some scientific basis for quercetin's use in supporting healthy cholesterol levels, the evidence is not robust enough to warrant routine use, and it should not replace established therapies.

More about quercetin
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