So enzymes speed up the rates of chemical reactions and that essentially produces the same amount of product as without the enzyme, but it produces that product at a much higher rate. Now, the thing about that is we don't always want to produce some given product at a high rate. Sometimes we want to basically stop the production of a product because simply we have too much of that product inside our cell or inside the environment in the first place. And so what that means is for the biological systems, such as our cells, to actually function effectively and efficiently, they have to have a way of actually controlling and regulating the activity and the functionality of enzymes. And one way by which we can actually control the activity of enzymes is by using these special molecules, and in some cases ions, to basically inhibit the activity of these enzymes. And these are known as Enzymatic inhibitors.