by: Dr. Ali McMillan

You, like everyone, have a whole ecosystem living within your gastrointestinal (GI) system. This ecosystem consists of trillions of bacteria, viruses, fungi, and other microorganisms, all interacting and relying on one another, just like animals in a forest do. When they live in harmony, our digestive system tends to treat us well. When this balance is disturbed, however, we may start to feel the effects.

The bacteria in our GI tract are the best studied, so they’re often the focus when we talk about the microbiome. These bacteria work hard to keep us healthy, and supporting them helps prevent both immediate and long-term health issues. Your beneficial bacteria help digest food and free up nutrients for absorption, but they need to exist in healthy numbers to do their job effectively. When certain bacterial populations are low, we may struggle to digest particular foods. Undigested food can then become fuel for other bacteria, sometimes resulting in gas, bloating, or diarrhea. If the microbiome isn’t functioning properly, you may not fully absorb nutrients, which can lead to deficiencies even in an otherwise balanced diet.

Your GI bacteria also ferment fibre into short-chain fatty acids (SCFAs). These SCFAs feed the cells lining your colon, help balance blood sugar, regulate your immune system, and increase hormones that promote feelings of fullness. They also suppress tumour growth, and some types may even help relieve pain. Healthy bacteria protect you from infection by occupying resources and physical space, leaving little room for harmful microbes to grow. One species, Lactobacillus plantarum, even communicates with your colon cells to strengthen the intestinal barrier and prevent unwanted substances from leaking into the bloodstream.

Variety is key when it comes to the microbiome. People with lower microbial diversity are at greater risk for chronic conditions such as type 2 diabetes, heart disease, and inflammatory disorders. Feeding your microbiome the right foods, especially a wide variety of fibres, helps maintain balance and resilience. Every time you eat a colourful mix of plant foods, you’re not just nourishing yourself; you’re feeding an entire internal ecosystem that, in turn, keeps you healthy.

Variety is key when it comes to the microbiome. People with lower microbial diversity are at greater risk for chronic conditions such as type 2 diabetes, heart disease, and inflammatory disorders.

Feeding your microbiome the right foods, especially a wide variety of fibres, helps maintain balance and resilience. Every time you eat a colourful mix of plant foods, you’re not just nourishing yourself; you’re feeding an entire internal ecosystem that, in turn, keeps you healthy.

Need assistance with getting your health on track? Speak with Dr. Ali McMillan she would be happy to support you on this journey. Dr. McMillan is providing an educational event this month on Gut Health.