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Plants Dose Bees with Caffeine to Keep Them Coming Back

ByTim De ChantNOVA NextNOVA Next

Kate Shaw, writing for Ars Technica:

Several plants, including species in the genuses Coffea and Citrus, produce nectar that contains caffeine; the concentration of caffeine in some of these flowers rivals that in a cup of instant coffee. We know what effects caffeine has on humans, but how does caffeinated nectar affect bees pollinating these plants?

It’s a fine line, though. Too much caffeine can kill insects.