How Syner G digestive Enzyme supplements work: without getting into an in-depth description of complex molecular chemistry and the function of an enzyme, we could compare an enzyme to a knife that cuts a slice of bread. The knife acts as a catalyst, causing a “chemical reaction”: the effect of cutting the bread into slices makes it easier to consume.  Essentially, enzymes perform exactly what the knife does in our example. Their catalytic action breaks down small food particles sufficiently so they can be absorbed and utilized by the body’s digestive functions.