When shopping for a non-DEET formula, here's what to look for in the ingredient list: ... Studies have shown that it's just as effective against mosquitos as DEET when used in a concentration of 20%, so it's one of the most proven swaps you'll find.

What's better DEET or no DEET?

Few studies have evaluated the relative efficacy of DEET and picaridin in fending off ticks, black flies, sand flies, no-see-ums, midges, and other biting insects. Available evidence indicates that picaridin and DEET are both effective at repelling black flies, while DEET is more effective at preventing tick bites.

Should I avoid DEET?

DEET is considered to be a safe insect repellent, according to the Centers for Disease Control and Prevention (CDC) and the Environmental Protection Agency (EPA). Many people worry that it could be harmful to health, possibly because it is a synthetic chemical, but research shows that these worries are unfounded.