Antibiotics and digestion
Saturday 19th December 2020
Effects of antibiotic use on the digestive system
Antibiotic resistance is perhaps the most well-known side effect of long-term use of antibiotics - a type of drug resistance, where a micro-organism can eventually withstand exposure to the antibiotic as a result of over-prescription and reliance.
However, there are actually many other side effects that can result from the long-term application and unnecessary use of antibiotics. Even short-term use (while often essential), can lead to issues.
One of the most significant effects is their impact on the digestive system, and the balance of microflora in the gut (a community of beneficial bacteria).
Can antibiotics cause digestive issues?
The simple answer is, yes they can.
Antibiotics work by either wiping out bacteria (bacteriocidal antibiotics) or by stopping bacteria from growing (bacteriostatic antibiotics).
Undoubtedly, they can be effective in overcoming bacterial infections. However, as mentioned above, the cost associated with such treatment is the risk of unwanted side effects and complications.
One of the main difficulties with antibiotic use is that, while they're intended to destroy bacterial cells, they cannot be programmed to kill only harmful bacteria (i.e. the pathogen causing the condition). They also destroy friendly bacteria, which is vital to the proper workings of the digestive system.
As a result, antibiotics commonly lead to an imbalance of good and bad bowel flora (dysbiosis), which can in turn lead to symptoms such as constipation, diarrhoea, bloating, Irritable Bowel Syndrome (IBS), bad breath, nausea and upset tummy.
Perhaps, more worryingly, antibiotics can also have a direct and negative impact on the immune system. Good bacteria exist in their millions throughout the body - on the skin, in openings like the oral cavity, nose area and genitals and, arguably most importantly, in the intestines of the digestive system. They undertake essential functions in all of these areas, however their most important role is to protect our bodies against prospective pathogens. The antibiotics are therefore damaging our bodies' natural ability to defend itself.
Imbalance of intestinal flora and immune function
Healthy intestinal flora is important for numerous functions in the body, including forming stools, sustaining a healthy digestive system and generating important vitamins (such as B vitamins). Yet, they're most crucial to the ideal functioning of our immune systems.
You may be surprised to learn that the most important part of our immune system is located in the gut. 70% of all antibody-producing cells within the body are situated in what is termed "Gut Associated Lymphoid Tissue" or GALT. This represents the biggest group of immune cells in the body.
Imbalances of gut flora can have a number of unpleasant side effects and manifest itself in many ways. For example, fungi (like Candida albicans) and bacteria like pathogenic strains of Staphylococcus aureus (MRSA) and C difficile tend to make the most of the opportunity presented by the body's reduced resistance, which means that they are then better able to grow more easily. This is a primary reason why antibiotic courses normally lead to thrush (a yeast infection caused by Candida overgrowth).
Similarly, C difficile infections have become prevalent in hospital wards and rest homes over the years. This is because, after antibiotic treatments, C difficile organisms can grow rapidly in the absence of the body's natural defences. The bacteria produce toxic compounds that inflame and kill the cells that line the large intestine, which can in turn cause intense diarrhoea and internal bleeding. Several other digestive ailments and complaints are also quite typical, such as dysbiosis, toxic bowels and IBS to name just a few.
How to balance your gut bacteria
Research indicates that the damage caused by antibiotics to the gut can last for a far longer period than was previously believed.
In 2013*, Stanford University experts in the USA examined the friendly gut bacteria in 3 healthy adult women both before and after each of 2 cycles on an antibiotic. After the first round, they discovered that the medication affected the level of the women's friendly bacteria in the gut drastically, perhaps even permanently. After the second cycle half a year later, they discovered that the impact was even greater.
As a result, it is advisable to take antibiotics only when absolutely necessary, i.e. when an infection is bad enough to cause discomfort and distress, or is life threatening or a risk to others. They should never be used as a repeated "quick fix" for small afflictions and lengthy programmes ought to be avoided wherever reasonably practicable.
If antibiotic intake is unavoidable, many individuals find it helpful to supplement their diets with additional friendly bacteria (probiotic supplements), before, during and after the programme of antibiotics is finished. It is believed that this will help to re-populate the digestive tract with the healthy bacteria that the antibiotics have decimated.
Photo @ dulgier
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