Making your own insect repellent sounds so simple: Just whip up a mixture of apple cider vinegar or witch hazel plus a few drops of some herby essential oils—no deet required. But there aren’t a lot ...

Mention DEET (chemical name, N,N-diethyl-meta-toluamide) in a crowded room, and you’re likely to hear a chorus of different opinions regarding its potential toxicity and health implications. Against a ...