A total of 26 participants with allergic skin rashes and allergies to dust mites were given injections of an allergy-producing substance. Despite the strong evidence, researchers are still unsure of the biologic processes that laughter may trigger in aiding the body's immune system. Nonetheless, there is a growing body of evidence that suggests stress hinders the body's immune system. Scientists surmise that laughter helps ease stress and in turn, helps the body stave off disease. ADHA's Frequently Asked Questions list may have the answer.
Tobacco is the primary cause of oral cancers.
Smoking a pack of cigarettes a day or using smokeless tobacco quadruples the risk of developing oral cancer. Oral cancer occurs twice as frequently in men as women. Toothbrushes should be replaced every two-three months and after illnesses, like a cold or flu. Three out of four patients don't change their toothbrush as often as they should. Two out of three dental hygienists report that they see signs of hypertension and heart disease in some of their patients.