Could your fruit vendor be selling you poison?

Vendors sell fruits to a motorist in Kibingoti market in Ndia constituency, Kirinyaga County. [Mose Sammy, Standard]

It is a foregone conclusion that eating fruits is one of the best ways to keep healthy. As they say, an apple a day keeps the doctor away. 

But chances are the apple, mango or banana you are eating may be doing you more harm than good.