Quercetin is a bioflavonoid similar to rutin. Human cell culture studies with quercetin demonstrated its capability to inhibit the release of histamines. NutraDrops Quercetin provides quercetin in a liquid base that is easily absorbed. Suggested Use 1-2 droppers as desired. Place liquid under the tongue, allow to remain for 30 seconds, and swish before swallowing. Ingredients Ingredient Amount Percent Daily Value Quercetin 134 mg Excipients purified water, fructose, glycerin, lactic acid, natural orange flavor, xanthan gum, lauric arginante, lecithin, stevia extract, and potassium benzoate. Warnings If you are pregnant, may become pregnant, or breastfeeding, consult your health care professional before using this product. Quercetin will stain fabrics. Be sure dropper is aimed towards the underside of the tongue before dispensing liquid. Do not use if either tamper-evident seal is broken or missing. Keep out of the reach of children. Shake well before using.