pH (Acid-Base Balance)
pH (acid-base balance) is an important indicator reflecting the chemical reaction of the intestinal contents. It reveals whether fermentative or putrefactive processes dominate and helps assess the state of the gut microbiota and digestion.
- Acidic reaction (pH < 6.0):
Most often associated with predominant fermentation in the intestines. It can occur in cases of:
- dysbiosis (reduction of normal gut flora);
- fermentative dyspepsia (excess of easily digestible carbohydrates in the diet);
- accelerated intestinal transit (e.g., in diarrhea).
- Neutral reaction (pH 6.8–7.2):
Considered a physiological norm. Indicates balanced digestion and a healthy gut microbiota.
- Alkaline reaction (pH > 7.5):
Suggests enhanced putrefactive processes. Possible causes include:
- slow intestinal motility (delayed fecal transit);
- diet rich in proteins;
- inflammatory conditions in the colon (colitis);
- deficiency of normal gut flora.
Evaluating stool pH allows physicians to detect hidden digestive disorders and imbalances in gut microbiota, aiding in the diagnosis of functional and inflammatory gastrointestinal conditions.