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Cardiovascular Health40 000 Capsaicin HUHerbal SupplementPromotes Healthy Circulation and Cardiovascular HealthSupports Healthy Digestive System FunctionSupports Diet-Induced Thermogenesis with 40 000 Capsaicin Heating Units (HU) Which May Increase The Speed of MetabolismScience-Backed Quality Since 1969Spice up your daily heart-health regimen with Swanson Cayenne! Well known as a culinary herb that lends its fiery flavor to a variety of dishes cayenne contains a compound called capsaicin which helps promote healthy circulation and cardiovascular function. Each capsule contains 450 mg of cayenne providing 40 000 heating units of capsaicin.