What should you know about lactobacillus and lactose intolerance?

Lactobacillus is a group of bacteria used in fermented foods such as some yoghurts. During fermentation, bacteria can change part of the lactose, so some people tolerate yoghurt better than milk. The amount of lactose and the live cultures vary between products.

Lactose intolerance happens when the small intestine does not make enough lactase to digest lactose. Undigested lactose can draw water into the bowel and be fermented by gut bacteria, leading to abdominal pain, bloating, gas or diarrhoea. Having Lactobacillus in a food does not establish that these symptoms are caused by lactose.

Record foods, portions and symptoms, then discuss a gradual lactose reduction and reintroduction with a clinician. You may tolerate small portions, yoghurt or hard cheese while reacting to milk. Lactose-free products can preserve familiar meals. Avoid removing all dairy without considering calcium, protein and vitamin needs.

A probiotic product containing Lactobacillus may suit some people, but products differ and digestive symptoms can have other causes. Food Intolerance Testing or Nutrition Counselling may be useful when the pattern is unclear or your diet is becoming restricted.

Get medical advice for ongoing diarrhoea, unexplained weight loss, symptoms that wake you, or repeated pain despite changing dairy intake. Seek urgent care for severe abdominal pain, blood in stool, persistent vomiting, fainting or pronounced dehydration. These warning signs should not be attributed to lactose intolerance without assessment.

Could fermented dairy be a reasonable trial for me? Should I have testing before changing my diet? How can I meet calcium needs if I reduce dairy, and could another digestive problem explain my symptoms?