Can You Develop Lactose Intolerance as an Adult?

For most people,

It's not uncommon for adults to experience a form of lactose intolerance that isn't present during childhood. Lactate intolerance primarily arises due to a natural decrease in lactase production

Understanding Lactose Intolerance

During infancy, mammals, including humans, produce lactase to effectively digest milk. However, as individuals grow past infancy, the production of this enzyme typically diminishes. This natural decline in lactase levels is the primary reason why lactose intolerance becomes increasingly common in adulthood.

Historically, the ability to continue producing lactase into adulthood was limited to certain populations that underwent a genetic mutation a few thousand years ago. Around 30% to 50% of the global population retains this ability due to this genetic advantage.

However, the majority of the world's population eventually loses their ability to produce lactase, leading to lactose intolerance. This is a normal biological process that affects approximately 60–70% of the world's population.

Factors Contributing to Lactose Intolerance in Adults

Genetic Factors

Lactase Persistence: People who have only one copy of the gene responsible for lactase persistence may start experiencing a decline in lactase production during adolescence or early adulthood. Those with two copies of the gene might experience a more dramatic decrease in lactase production in later years. Stomach pH Levels: Some individuals may lose lactase tolerance due to age-related changes in stomach acid levels. Reduced stomach acid can make it more challenging for the body to produce lactase effectively.

Specific Situations

Gluten Sensitivity: People with gluten sensitivity may experience a decrease in lactase production, potentially leading to lactose intolerance. Age-Related Changes: As people age, the body's natural ability to produce lactase declines, regardless of any underlying conditions.

How Lactose Intolerance Develops

Upon birth, a baby's body produces lactase in sufficient amounts to enable the digestion of mother's milk. Lactase breaks down lactose into glucose and galactose, which are easier to digest. As the baby grows, the body naturally reduces the production of lactase, leading to lactose intolerance.

In some cases, ethnic groups have adapted to continue producing lactase into adulthood. This genetic adaptation allows certain populations to consume dairy products without issues. However, this adaptation is not universal and affects only a portion of the global population.

Most people will eventually develop lactose intolerance, even if they were able to digest dairy products without problems in their younger years. This highlights the natural decline in lactase production as a common biological occurrence.

Moderating Dairy Consumption

For adults who have developed lactose intolerance, the changes in dietary habits can significantly impact overall digestion and well-being. Here are some strategies to help manage lactose intolerance:

Moderate Dairy Intake: Consume dairy products in small portions, such as aged cheese and yogurt, which may be better tolerated due to their lower lactose content. Goat and Sheep Products: These alternatives often have fewer lactose levels and can be easier to digest for those with lactose intolerance. Use Lactase Enzyme Supplements: Taking a lactase enzyme tablet or liquid before consuming dairy products can help break down lactose and improve digestion.

By modifying dietary practices and utilizing lactose enzyme supplements, individuals with lactose intolerance can continue to enjoy a balanced diet that includes dairy products.