What is lactose intolerance?

What is lactose intolerance?

What is lactose intolerance?

Lactose is the sugar that is found in the milk produced by all mammals, including humans. Sometimes people don't produce enough of the enzyme lactase in their gut to broken down the lactose.

Only a few babies are born with true lactose intolerance, a rare genetic condition in which they lack all lactase enzymes. (This condition is known as primary lactose intolerance.) Many people, however, develop lactose intolerance after the age of five. Aboriginal Australians, as well as people from Asia, Africa, the Middle East, and some Mediterranean countries, are more likely to have it.

If the lining of their gut is damaged by an illness like gastroenteritis, or an allergy or intolerance to another food, babies and young children can develop milk intolerance. This is called secondary lactose intolerance and will go away after the gut heals, usually over a few months.

What causes baby lactose intolerance?

Baby lactose intolerance is usually caused when your baby does not have or doesn’t make enough of a digestive enzyme called lactase. Lactase is produced in the gut, and it helps to breakdown or digest lactose in the diet.

Symptoms may include:

The symptoms of lactose intolerance can be similar to other conditions, meaning that it’s sometimes are hard to identify. However, common symptoms include

  • pain and swelling in the tummy
  • failure to settle at feeding times, coming on and off the breast
  • diarrhea
  • red bottom with skin worn away in places
  • liquid, sometimes green, frothy stools
  • being irritable
  • passing a lot of gas
  • nappy rash


Nutrisaine LF is a lactose-free infant milk for babies who are lactose intolerant, or who are experiencing symptoms such as diarrhea, tummy ache or wind caused by temporary lactose intolerance. Nutrisaine LF Lactose-Free Infant Milk is nutritionally complete, and suitable as the sole source of nutrition for infants from birth. For older babies, it can be used as part of a mixed diet. It is suitable from birth onwards .