WHAT IS QUERCETIN? Quercetin is a popular flavonoid that is most commonly known for its presence in a number of plants. This includes apples, onions, capers and berries. Other common plants that contain flavonols like quercetin are horse chesnut, St. John\'s wart, ginkgo biloba and many more. OUR QUERCETIN COMPLEX SUPPLEMENT Our Quercetin supplement provides high-quality quercetin combined with the ideal blend of bromelain, resveratrol, bioflavonoids and vitamin C. This makes sure that our Quercetin supplement is a potent antioxidant.  WHAT DOES OUR QUERCETIN COMPLEX DO? Vitamin C contributes to normal: Collagen formation for the normal function of blood vessels, bones, cartilage, gums, skin and teeth Energy-yielding metabolism Functioning of the nervous system Protection of cells from oxidative stress Reduction of tiredness and fatigue Regeneration of the reduced form of vitamin E Iron absorpotion Pantothenic acid (vitamin B5) contributes to normal:  Energy-yielding metabolism Mental performance Synthesis and metabolism of steroid hormones and vitamin D Reduction of tiredness and fatigue SUITABLE FOR VEGANS Our Quercetin Complex supplement is suitable for vegetarians and vegans. It is also approved kosher and does not contain any major allergens.