6 Foods That Harm Gut Health
The British nutrition-focused website “Five” published a report identifying six common types of food described as the most harmful to gut health and the body’s microbiome, warning that excessive consumption disrupts the balance of beneficial bacteria responsible for digestion, immunity, and mood regulation.
The report explained that the gut contains trillions of bacteria, fungi, and other microorganisms, collectively known as the “microbiome,” and that any imbalance can lead to bloating, gas, constipation, and fatigue, in addition to chronic inflammation over the long term if the imbalance remains untreated.
3. Artificial sweeteners, which may alter the composition of beneficial bacteria in some individuals.
The report noted that ultra-processed foods are manufactured using industrial techniques and often contain stabilizers and preservatives rarely found in home kitchens. At the same time, they are low in natural fiber and high in refined fats and sodium, depriving beneficial bacteria of the nutrients they need to perform their functions.
Nutrition experts pointed out that refined sugars not only cause tooth decay and elevated blood sugar levels but also directly affect the composition of the microbiome. Meanwhile, some artificial sweeteners, such as aspartame, saccharin, and sucralose, have conflicting evidence regarding their impact on gut bacteria, unlike other substances like stevia and erythritol, which are considered safer when consumed in moderation.
The report recommended replacing ready-made meals with homemade dishes made from whole ingredients, substituting manufactured sweets with fresh fruit or yogurt with berries, preferring whole grains over refined carbohydrates, and increasing servings of fiber-rich vegetables.
Experts emphasized that the goal is not complete avoidance of these foods, but rather gradually reducing their consumption in favor of more balanced choices, stressing that a gradual shift toward a fiber-rich diet makes a tangible difference in long-term digestive health.
