Summer has returned — and for most of us that means two things for certain: we'll be outdoors a whole lot more, and we'll be joined by a variety of biting or otherwise irritating bugs. Since it was developed by the U.S. military in the 1940s, a synthetic repellent — DEET — has served as the primary ingredient for keeping bugs at bay. Some people, however, can't use DEET at its most effective and longest lasting strength without negative consequences. Fortunately, there’s an array of reasonably effective alternates, mostly natural oils and plant extracts that are nontoxic.
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