Organic Quercetin Extract Powder | Clinical Series™

Clinical Series™ Organic Quercetin Extract Powder

Quercetin is one of the most extensively researched flavonoids in nutritional science — a potent plant polyphenol found naturally in onions, capers, and berries. Our Clinical Series™ Quercetin Extract Powder delivers a concentrated, bioavailable form of this remarkable compound, supporting everything from allergy relief to cardiovascular protection. Backed by hundreds of peer-reviewed studies, quercetin is a cornerstone of evidence-based herbal supplementation.

Key Benefits & Clinical Evidence

• Natural Antihistamine — Allergy & Hay Fever Relief
  Quercetin stabilises mast cells and inhibits the release of histamine, reducing symptoms of seasonal allergies, hay fever, and histamine intolerance.
  Clinical evidence: A study in the International Journal of Molecular Sciences (2016) confirmed that quercetin suppresses histamine secretion from mast cells and basophils by inhibiting calcium ion influx, offering a natural alternative to conventional antihistamines without sedative side effects.
• Anti-inflammatory & Pain Relief
  Used in herbal protocols for arthritis, joint pain, and autoimmune inflammation by inhibiting key inflammatory enzymes.
  Clinical evidence: Research published in Nutrients (2019) demonstrated that quercetin significantly inhibits COX-1, COX-2, and 5-LOX enzyme pathways — the same targets as NSAIDs — reducing pro-inflammatory prostaglandin and leukotriene production without gastrointestinal side effects.
• Antioxidant Support
  Fights oxidative stress and free radicals, protecting cells in the brain, lungs, and cardiovascular system from damage.
  Clinical evidence: A meta-analysis in the European Journal of Nutrition (2020) found that quercetin supplementation significantly reduced markers of oxidative stress including malondialdehyde (MDA) and increased superoxide dismutase (SOD) activity across multiple randomised controlled trials.
• Immune System Modulation
  Enhances immune response while moderating overactivity — particularly useful in chronic inflammation and autoimmune conditions.
  Clinical evidence: Studies in Frontiers in Immunology (2021) showed quercetin modulates T-cell activity and reduces NF-κB signalling — a key driver of chronic immune dysregulation — supporting balanced immune function.
• Cardiovascular Health
  Supports healthy blood pressure, reduces LDL oxidation, and improves circulation, helping protect blood vessels from atherosclerosis.
  Clinical evidence: A randomised controlled trial published in the British Journal of Nutrition (2007) found that 150mg/day of quercetin significantly reduced systolic blood pressure in hypertensive participants. Further research in the Journal of Nutrition confirmed its role in reducing oxidised LDL cholesterol.
• Respiratory Health
  Reduces airway inflammation and mucus buildup, beneficial in asthma, COPD, and bronchitis.
  Clinical evidence: Research in Phytotherapy Research (2018) demonstrated that quercetin inhibits the release of inflammatory mediators in bronchial epithelial cells, reducing airway hyperresponsiveness in preclinical asthma models.
• Blood Sugar & Metabolic Support
  May improve insulin sensitivity and help balance blood glucose, with applications in metabolic syndrome and weight management.
  Clinical evidence: A systematic review in Phytomedicine (2017) concluded that quercetin supplementation significantly reduced fasting blood glucose and HbA1c levels in diabetic subjects, with mechanisms including inhibition of α-glucosidase and enhancement of GLUT4 expression.

Suggested Use

Add 1–2 teaspoons (approx. 3–5g) to smoothies, shakes, juices, oats, or your favourite recipes. Stir well and enjoy daily. For best results, use consistently. Pairs well with Bromelain, Vitamin C, or Nettle Leaf for enhanced absorption and effect.

Storage

Store in a cool, dry place away from direct sunlight. Reseal tightly after use. Best before: 6 months after opening.

Quality Assurance

100% pure & natural. No fillers, binders, or preservatives. Net Weight: 50g / 100g. Manufactured to premium quality standards by The Herbal Remedies, Manchester, UK.

This product is a food supplement. Not intended to diagnose, treat, cure, or prevent any disease. Consult a healthcare professional before use if pregnant, breastfeeding, or taking medication.