The “sober curious” or “sober sometimes” movement started as a challenge for those who felt they’d partied a little too hard over New Year’s weekend. A 2016 British study of about 850 men and women who volunteered to abstain from alcohol during Dry January found that participants reported a range of benefits. For instance, 82 percent said they felt a sense of achievement. “Better sleep” was cited by 62 percent, and 49 percent said they lost some weight. They had improvements in insulin sensitivity, their blood pressure numbers improved, and their livers looked a little healthier.