They drink less alcohol, eat more vegetables, cut back on meat, meditate often, enjoy knitting and make their own pour-over coffee. Meet the “clean lifers,” the young adults who revel in dodging the indulgences of their elders.

“In terms of living an objectively healthy lifestyle, this group is inspiring the older generations,” says Sam Calagione, chief executive and founder of Dogfish Head Craft Brewery Inc.

The brewery joins a host of other product makers targeting young adults who aspire to moderation but still might want to buy a beer, brownie pan or a packaged salad. Many young adults, having grown up during the recession, pursue healthful living as a way to find balance amid the global uncertainty that continues today.

Mr. Calagione, 48 years old, created SeaQuench Ale, a low-alcohol, low-calorie brew with middle-aged, slowing-metabolism drinkers like himself in mind. But sales took off among young, fitness-minded adults, propelling SeaQuench Ale to be Dogfish Head’s fastest growing beer. “We didn’t think it would be pulling in all these whippersnappers to the degree it has,” says Mr. Calagione.

This year, Dogfish Head plans to target the “après-yoga” moment with its Namaste White beer, a low-alcohol brew flavored with orange and lemongrass, by holding promotional events at yoga studios. The company this year started selling the beer—named after the respectful greeting used in yoga classes—in the 12-ounce cans that young adults prefer. “The portability of cans dovetails with their active lifestyle outside, hiking, boating or skiing—the pack-in, pack-out crushability of the can is a big factor with them,” says Mr. Calagione.