From the Manufacturer:
Capsicum is added to many herbal formulas as a catalyst for the other herbs. It also stimulates digestion and enhances blood flow. It became NSP’s first product back in 1972 after Gene Hughes took it by the spoonful to help his stomach. Each capsule contains 520 mg capsicum. The capsicum used in this product contains 35,000–40,000 Scoville Heat Units.