When the Affordable Care Act was passed into law in 2010, 2.5 million young adults from 19 to 25 were able to get health insurance through their parents’ health plan, according to the U.S. Department of Health and Human Services. Before the law, 13.7 million young adults – or roughly one-third of the nation’s total uninsured population – were uninsured, according to the Kaiser Family Foundation. If the Supreme Court decides to strike down the health reform law, those 20-somethings will be without insurance again. Less than a quarter (24%) of workers between the ages of 19 and 25 were offered health insurance by their employers in 2010, down from 34% in 2000, according to the Employee Benefit Research Institute. “They can try to buy insurance on their own but many don’t or can’t afford it,” said Gary Claxton, vice president of the Kaiser Family Foundation.