RadioMD News... I'm John Byrd E-cigarettes are just as addictive as tobacco and just as harmful, finds a new study. In addition to nicotine, a habit-forming chemical additive called "pyrazine" is found in both to enhance taste and smell. The news comes amid a huge spike in e-cigarette use, due to the belief that it is safer and less addictive than cigarettes. More than half of U.S. children and teens are not drinking enough water, a new study suggests. With the high activity level of youngsters, enough water is even more crucial. Even mild dehydration can cause headaches, irritability, and poorer physical and mental performance. And... want to ward off disease and live longer? Grab some nuts, say experts. Eating peanuts, almonds, cashews and walnuts are linked to better cardiovascular health and lower mortality rates from respiratory illnesses, cancer and neurodegenerative diseases. In one the saddest addendums of the week... there seems to be no similar effect from peanut butter. Researchers say it's all the salt and oils. For RadioMD News, this is John Byrd. Hear health talk interviews with top experts at RadioMD dot com.