Antibiotics can be lifesaving when it comes to treating infections but their effects on the gut are not always so positive. While they work to eliminate harmful bacteria, antibiotics are unable to distinguish between the ‘bad guys’ and the ‘good guys’ that support your digestion, immunity, brain and overall health.
Inside your gut lives a diverse community of bacteria, fungi and other microorganisms collectively known as the gut microbiome. This ecosystem helps you break down food, absorb nutrients, regulate inflammation and even produce brain-supporting chemicals like serotonin. When you take antibiotics, many of these friendly bacteria are wiped out alongside the infection-causing strains. This sudden loss of diversity can leave the gut vulnerable to imbalance, often called dysbiosis.
Dysbiosis can show up in many ways – bloating, diarrhoea, constipation or food sensitivities. Longer-term, it may also weaken the gut barrier, increasing the risk of ‘leaky gut’ where unwanted particles pass into the bloodstream and trigger immune reactions. Studies link repeated antibiotic use to higher chances of developing issues like Irritable Bowel Syndrome (IBS), Inflammatory Bowel Disease, anxiety, depression and ADHD.
Another concern is that antibiotics can encourage the growth of resistant bacteria, which not only reduces the effectiveness of future treatments but can also shift the balance of the gut microbiome further away from good health.
The good news? The gut is resilient. Eating a fibre-rich diet, including prebiotic foods (like onions, garlic and asparagus) and adding fermented foods (such as yoghurt, sauerkraut or kefir) can help restore balance. Be careful with fermented foods if you have a histamine intolerance as these are high in histamine. Probiotics support recovery after a course of antibiotics but you can take probiotics alongside to get a head start!
While antibiotics are sometimes necessary, being mindful of their impact and supporting your gut health afterwards can make all the difference in your long-term wellbeing.
If you’d like to find out how antibiotics are affecting your gut, the gut test is a great way to find out.
This test is included in the Mind Your Gut program. Book a free 20 min call or Zoom with Sal to find out more.