pH (Acid-Base Balance)

pH (acid-base balance) is an important indicator reflecting the chemical reaction of intestinal contents. It indicates predominant processes — fermentation or putrefaction — and helps assess microflora and digestion status.

• Acidic reaction (pH < 6.0):
  Most commonly associated with predominant fermentation processes in the intestine. May be observed in:
  • dysbiosis (reduction of normal microflora);
  • fermentative dyspepsia (excess easily digestible carbohydrates in the diet);
  • accelerated intestinal transit (e.g., diarrhea).
• Neutral reaction (pH 6.8–7.2):
  Considered physiological norm. Indicates balanced digestive processes and normal microflora.
• Alkaline reaction (pH > 7.5):
  Indicates enhanced putrefactive processes. Possible causes:
  • slowed intestinal motility (fecal retention);
  • predominance of protein-rich diet;
  • inflammatory processes in the colon (colitis);
  • deficiency of normal flora.

Assessment of stool pH allows the physician to identify hidden digestive disorders, alterations in intestinal microbial composition, and aids in diagnosing functional and inflammatory gastrointestinal tract conditions.