What are the 3 types of lactose intolerance?

Can you become lactose intolerant?

Yes. Some people who develop lactose intolerance are not born with it. The body naturally produces less lactase after childhood, and symptoms can start at any age. Lactose intolerance can also develop temporarily after an illness or infection that irritates the small intestine, in which case it may improve once the gut recovers. We officialy call this secondary lactose intolerance or in unofficial terms ‘sudden lactose intolerance‘ (1).

Types of lactose intolerance

Lactose intolerance can be classified into different types, each with its own underlying causes. These include (1):

• Primary lactose intolerance: This is the most common form of lactose intolerance, where lactase production gradually decreases with age. It affects adults who, as children, were able to digest lactose but eventually lost that ability. This condition is particularly common in certain populations, including those of Asian, African, and Hispanic descent.
• Secondary lactose intolerance: This form occurs due to illness or injury to the small intestine, such as celiac disease, Crohn’s disease, or after a gastrointestinal infection. When the underlying condition is treated, the body may resume lactase production, and the intolerance can sometimes be reversed or reduced. Somteimes people call this ‘sudden lactose intolerance‘.
• Developmental lactose intolerance: Premature infants may have lactose intolerance because their small intestines are not fully developed. However, this condition usually resolves itself as the child grows and the digestive system matures.

How do you manage lactose intolerance?

Different types of lactose intolerance require tailored management strategies:

• Primary lactose intolerance: Symptoms can often be reduced with Lactase enzyme supplements or by consuming lactose-free or low-lactose dairy products (2).
• Secondary lactose intolerance: In these cases, treating the underlying health condition often helps to manage this lactose intolerance. During recovery, it’s important to limit or avoid dairy products until the intestine heals. This text doesn’t go into secondary lactose intolerance, it’s important to consult with a dietitian or healthcare provider.
• Congenital and developmental lactose intolerance: For those born with lactose intolerance, it’s critical to use lactose-free formula and ensure a dairy-free diet. Careful dietary management continues throughout life for those with congenital lactose intolerance.

By understanding the type of lactose intolerance, individuals can make informed choices about their diet and seek appropriate treatments, such as lactase supplements or lactose-free alternatives.

What are the levels of lactose intolerance?

Are there levels of lactose intolerance? The simple answer is yes, lactose intolerance doesn’t affect everyone in the same way. People have different thresholds for how much lactose they can handle, leading to varying levels of intolerance:

• Partial lactose intolerance (low): People with a low level of lactose intolerance can usually tolerate small amounts of lactose, often found in fermented dairy products like yogurt or aged cheeses. These foods naturally contain less lactose due to the fermentation process.
• Semi lactose intolerance: Individuals at this level may experience discomfort after consuming larger quantities of dairy but can tolerate smaller amounts. They may need to limit their intake of high-lactose products, such as milk and ice cream, but can still enjoy moderate servings of low-lactose foods.
• Severe lactose intolerance: People with severe lactose intolerance must avoid lactose entirely, as even small amounts can trigger symptoms like severe bloating, cramps, diarrhea, and nausea. They often rely on lactose-free products or dairy alternatives, such as almond, soy, or oat milk, to meet their dietary needs.

To determine their level of lactose intolerance, individuals can undergo testing or experiment with their diet by gradually reintroducing dairy to observe how much they can tolerate without discomfort.

If you have more questions about lactose intolerance, contact one of our specialized dietitians and get personalized advice.

If you are not certain if you suffer from a lactose intolerance, you can take the intolerance test for more insights.

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.