Intranasal (within the nose, also called "endonasal") blood irradiation devices such as the light therapy devices by RadiantLife in the form of "Qi-Light" and "LT" are emerging as prominent alternatives to drugs for several prominent diseases that are related to high blood pressure, diabetes complications, high cholesterol, age-related diseases. Other diseases and disorders include sinusitis, hay fever, asthma and those that are related to blood circulation. These are supported by scientific studies presented in the various pages of this website.