The secret of preparing tasty and inviting pizzas lies precisely in the conscious use of yeast: the latter is found on the market in many different forms (the most common is the famous cube, which is then accompanied by the inevitable package of dry yeast to be reactivated and, finally, the classic yeast for instant use. Essentially composed of fungi of the Saccharomyces cerevisiae type, yeast is not only used to prepare bread, but also to obtain beer and, in some cases, even beer. wine.