The “Good” and the “Bad””
It is a well-known fact that the bacteria in the human gut comprise of both “bad”, or harmful bacteria; and “good” or beneficial bacteria. Common bad bacteria include some species of bacteroides, which have been linked to various types of infections when they escape the intestine wall, and to colon cancer. Common “good” bacteria includes various types of lactic acid bacteria such as lactobacillus and bifidobacterium, which are generally abundant in healthy individuals, especially in young children. Through various processes, such as chemical metabolises and fermentation, these bacteria become absorbed into our bodies and act on our health system in many ways, including both beneficial and harmful.
Some of the benefits produced by the “good” bacteria include the production of essential fatty-acids, some types of vitamins, and molecules that assist in functions of the brain. Other types of “good” bacteria have anti-body forming properties that can ward off and prevent the growth of some types of “bad” bacteria. At the same time however, there is a growing body of research that links various groups of “bad” bacteria to pathogens causing infections, inflammations, and other harmful invasions, and that are linked to many common diseases, including those of the skin, lungs, joints and muscle tissue, and others.
While “bad” bacteria are ever present, both on the outside and the inside of our bodies, an important aspect of maintaining good health is to keep them from multiplying excessively and becoming the dominant form of bacteria in our gut. If “bad” bacteria are dominant they may gain greater opportunity to become absorbed into our bloodstream and organs and cause disease. For good gastro-intestinal health, the prevention of excessive proliferation of “bad” bacteria is essential. Keeping “bad” bacteria growth in check can be accomplished by ensuring that the flora of “good” bacteria in our gut are dominant in proportion to the “bad” bacteria. A large body of common research has shown that, in addition to anti-body forming properties, “good” bacteria accomplish this because they tend to promote a slightly acidic environment in the gut. Since many types of “bad” bacteria do not survive well in an acidic environment, the presence of “good” bacteria in sufficient numbers helps inhibit the proliferation of pathogenic bacteria.