- Gas, bloating, and diarrhea
- Abdominal pain or cramping
- Constipation
- Diagnosis of irritable bowel syndrome (IBS) or inflammatory bowel disease (IBD)
- Food intolerances such as gluten, casein, lactose, fructose, and particularly histamine intolerance
- Chronic illnesses such as fibromyalgia, chronic fatigue syndrome, diabetes, neuromuscular disorders and autoimmune diseases
- Vitamin and mineral deficiencies, including vitamins A, B12, D, and E
- Fat malabsorption which signified by pale, bulky, and malodorous stools
- Rosacea and other skin rashes
- Leaky gut
