At the same time, a large number of people get sick every year due to spoiled food.

Back to Shakespeare's quote If music be the food of love, play on Give me excess of it, that, surfeiting The appetite may sicken, and so die.

Basically, a human body is a conversation going on, both within the cells and between the cells, and they're telling each other to grow and to die, and when you're sick, something's gone wrong with that conversation.