Radiance is another of Syringa’s Replenishing Cream based products. The active ingredient in Radiance is capsaicin, an extraction from red chilli peppers. Capsaicin works to relieve pain by stimulating pain sensing neurons in the areas of application. Initially this may cause a burning sensation but over time depletes the pains transmitting chemicals (known as substance P) and thus blocks the reception of pain signals to the brain. Radiance is a potent topical analgesic. It is effective in the treatment of sore muscles and joints, but it is especially helpful to those who suffer from chronic pain.