One of the concerns with fasting is that it may harm the good bacteria in our gut. The logic behind this concern is that when we fast, we deprive the bacteria of the food they need to survive and thrive. Without food, these bacteria may die off, which could have negative consequences for our health.
So, the question remains: Does fasting kill your good microbiota?
The answer is not as simple as a yes or no. The impact of fasting on our microbiota is still a topic of research, and there are conflicting results. Some studies suggest that fasting may have a negative impact on our gut bacteria, while others show no significant changes.
One study conducted on mice found that prolonged fasting (72 hours) resulted in a decrease in the diversity of gut bacteria. Another study found that alternate-day fasting led to a decrease in the number of beneficial bacteria in the gut.