In a few cases this type of diet was recommended by the doctor (usually in the flare-up phases based on the hypothesis of lactase deficiency induced by mucosal damage), in other cases it was the patient who made this decision (for example, after consulting specific publications or the web), while in other cases, milk and dairy products were eliminated because they were perceived as foods that caused a worsening of symptoms. This evidence concerns the gene LCT and hyperinsulinemic hypoglycemia, familial, 4.