Lychee
Researchers confirmed lychees — particularly unripe ones — contain a toxin that keeps us from synthesizing glucose. That, in turn, leads to low blood sugar levels, and we all know that can cause some major problems. The children of Muzaffarpur (which produces about 70 percent of India’s lychees), were filling themselves with lychees after skipping an evening meal, and it proved to be a deadly combination. If you’re struggling with managing your blood sugar, give these a miss.