Juul Labs Inc., the maker of the popular e-cigarette brand that has recently come under fire from health officials over its popularity with young adults, plans to introduce a line of lower-nicotine pods.

The company will begin to sell pods with a 3-percent nicotine concentration in its mint and Virginia tobacco flavors later this year, according to a statement Thursday. It currently offers eight flavors -- mango is a top seller -- containing a 5-percent nicotine level, which is about...