Metabolics Quercetin is a high-quality flavonoid supplement derived from the buds of Sophora japonica, a botanical source known for its rich quercetin content. Quercetin is a naturally occurring plant flavonol, widely found in onions, apples, grapes, berries, teas and many colourful fruits and vegetables.

With its molecular structure and multiple hydroxyl groups, quercetin acts as a powerful antioxidant and free-radical scavenger, helping to protect cells from oxidative stress and supporting the body’s natural defences against environmental and metabolic stressors.

Our capsules deliver 250 mg of pure quercetin per daily dose.

This product is ideal for people who:

want to boost their intake of flavonoids as part of a balanced, nutrient-aware diet

seek natural antioxidant support to defend against oxidative stress from daily life and environment

prioritise clean supplementation - plant-derived, no unnecessary fillers, suitable for vegetarians/vegans.

want to support long-term health and resilience with simple, daily nutritional insurance

Botanically sourced & standardised - we use Sophora japonica extract to ensure a reliable, high-purity source of quercetin.

Clean formulation - no fillers, artificial colours, preservatives or unnecessary additives; just quercetin in a vegetarian-friendly capsule.

Manufactured to rigorous standards - produced in a GMP-certified facility in the UK, with strict quality control so you know exactly what you are getting.

Practitioner-trusted - designed with clinical relevance in mind, offering a supplement for users who want substance over hype, aligned with how serious health professionals approach nutritional supplementation.

Metabolics Quercetin is a high-quality food supplement containing quercetin extracted from the buds of Sophora japonica L., a plant recognised for its natural flavonoid content. Quercetin [2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy-4H-chromen-4-one] is a naturally occurring flavonol predominantly found in onions and, in smaller amounts, in apples, cherries, grapes, black tea, and green tea. It belongs to a broader group of plant-derived polyphenols known as flavonoids. These compounds are characterised by their diverse phenolic structures and their capacity to interact with oxidative and enzymatic processes within the body. As quercetin is not synthesised by the body, it must be obtained through diet or supplementation.

Quercetin's physiological relevance lies in its molecular structure, which includes multiple hydroxyl groups. These enable it to interact with reactive oxygen species (ROS), unstable by-products generated during normal metabolism and in response to environmental exposures such as pollutants and ultraviolet light. Through this interaction, quercetin is part of the body’s antioxidant network. Additionally, it has been shown to modulate the activity of enzymes involved in oxidative and inflammatory pathways, suggesting a role in the body’s adaptive response to stress.

Quercetin is often studied in the context of seasonal environmental changes that influence histamine release and immune cell activity. Its interaction with enzymes and signalling pathways linked to the body’s response to airborne particles has made it a subject of interest in research exploring natural compounds associated with the body's response to pollen and other seasonal exposures.