Quercetin is a naturally occurring flavonoid that acts as a mast cell stabiliser — inhibiting the release of histamine from immune cells, supporting the body's natural response. Viridian pairs quercetin with pantothenic acid (vitamin B5) — critical for adrenal function and cortisol production. Chronic allergy places sustained demands on the adrenal glands, and B5 deficiency is common in those with ongoing allergic conditions.What It's Used For Hay fever and seasonal allergy management Histamine intolerance and food sensitivities Immune modulation and anti-inflammatory support Adrenal support and stress resilience Antiviral support — upper respiratory immune defence How to UseAdults: 1–2 capsules, 1–3 times daily, taken with food. For seasonal allergies, best started 4–6 weeks before the allergy season.Nutritional Information Nutrient Per Serving % NRV Quercetin (from Quercetin dihydrate) 500mg † Pantothenic Acid (Vitamin B5) 50mg 833% * NRV = Nutrient Reference Value. † NRV not established.? If you are taking any medication, are pregnant or breastfeeding, or have an underlying health condition, please consult your doctor before taking this supplement.