Mold has been around for millions of years and while certain varieties of it can be quite harmful to our health, there are other varieties that have been used by human beings for years in order to improve our quality of life in one way or another. It has been used in foods, medicines, and to help decompose organic matter.

Many different kinds of foods have been made with mold over the years, one of the most famous of which is cheese. Blue cheese was invented quite by accident a long time ago when mold had started to grow in a block of cheese that had been left to age. It is salty, crumbly and is a somewhat acquired taste, if the blue mold veins of the cheese do not stop you from tasting it in the first place. Roquefort and gorgonzola are also made with molds. The culturing of just the right kind of mold to make these blue cheeses has become a science over the years and these moldy cheeses are often referred to as the kings of cheese.

Aspergillius oryzae or koji-kin, as it is known in Japan, has been used for centuries to create the Japanese alcoholic drink of sake. Without the magical koji, they say, there is no sake. Sake is not the only type of drink that uses the koji mold as an ingredient. It is sprinkled on top of steamed rice and provide the enzymes that are needed for making the sugar the yeast needs to grow. The mold has an immensely important role in the creation of sake and any brewer proud of his drink is sensitive about its handling. Depending upon the flavor wanted in the sake, the koji creation process can be affected by different temperatures, the kind of rice used, the mineral content of the water, and other factors seriously affect the final product.

Penicillin was created by Alexander Fleming back in the early 1900s by accident and it has been used by countries worldwide since then in order to help the human body fight all kinds of infections. While some people have been known to be allergic to penicillin, allergic reactions are not so common as to stop doctors from prescribing it.

Aside from the uses that human beings have made of mold, its natural role is to decompose dead organic matter in its natural environment. This is one reason that it often finds its way into our homes, because our homes tend to be made of wood and sheetrock that has paper on it. This is what mold feeds on and until we start making our homes out of synthetic materials, we will probably have a hard time keeping mold out of them.