Youth using e-cigarettes three times as likely to become daily cigarette smokers: Study ANI | Updated: Jan 11, 2021 11:24 IST California [US], January 11 (ANI): Starting tobacco products, including e-cigarettes, before the age of 18 is a major risk factor for people becoming daily cigarette smokers, suggests a new study. This was reported in the analysis of a large nationally representative longitudinal study by the University of California San Diego Herbert Wertheim School of Public Health and Human Longevity Science. Reporting in the online edition of Pediatrics, researchers found that in 2014 people age 12 to 24 who used e-cigarettes were three times as likely to become daily cigarette smokers in the future. Among those who reported using a tobacco product, daily use increased with age through age 28. Daily cigarette smoking nearly doubled between 18 to 21-year-olds (12 percent) and 25 to 28-year-olds (21 percent).