What is lactose intolerance?

Lactose intolerance is a condition in which the body cannot fully digest lactose, a sugar found in milk and milk products. It occurs when the small intestine does not have enough of the enzyme lactase, which is needed to break down lactose into glucose and galactose, which are later absorbed into the blood. If lactose is not broken down, it ends up in the large intestine, where bacteria ferment it, causing a variety of unpleasant symptoms.

Lactose intolerance is common throughout the world, and its prevalence may vary by ethnic group and geographic region. It is especially common among people in Asia, Africa, and southern Europe, while it is less common in northern Europe and some parts of North America. Symptoms usually appear in adulthood, as lactase levels are usually high enough to digest milk in childhood.

Although lactose intolerance is not life-threatening, it can significantly affect quality of life, causing discomfort and limiting dietary choices. Therefore, it is important to understand the nature of this condition and how to manage it in order to reduce symptoms and ensure a well-rounded diet.

Causes of lactose intolerance

Lactose intolerance occurs when the body lacks the lactase enzyme needed to break down lactose. This condition has several causes and can appear at different stages of life.

Primary lactose intolerance

Primary lactose intolerance is the most common form of this condition. It is genetically determined and associated with a gradual decrease in lactase activity after childhood. Most babies have high levels of lactase, which helps digest breast milk. But as they grow older, many people begin to lose this ability, which leads to lactose intolerance.

Secondary lactose intolerance

Secondary lactose intolerance occurs as a result of other medical conditions that damage the lining of the small intestine, such as celiac disease, Crohn's disease, or gastroenteritis. These disorders can reduce lactase production and lead to lactose intolerance. This type is usually short-lived and may improve when the underlying condition is treated.

Hereditary lactose intolerance

Congenital lactose intolerance is a rare genetic disease that occurs in newborns who completely lack the lactase enzyme. This condition is inherited in an autosomal recessive manner, and symptoms appear as early as the first days of life when the baby is breastfed. Inherited lactose intolerance requires immediate medical intervention and a special diet.

Symptoms and diagnostics

Symptoms of lactose intolerance can appear hours after consuming dairy products and include digestive disturbances.

Manifestations of symptoms

The most common symptoms of lactose intolerance are:

• Bloating and gas: the fermentation process in the colon produces gases that cause bloating. These symptoms can cause discomfort and even pain.
• Diarrhoea: Unabsorbed lactose attracts water in the colon, causing diarrhea. This can lead to fluid loss and dehydration if the diarrhea is severe.
• Abdominal pain and cramps: they occur as a result of intestinal muscle spasms. These seizures can be intense and interfere with daily activities.
• Nausea: Some people may experience nausea after consuming products containing lactose, which may be due to intestinal irritation.

The severity of symptoms may vary depending on the amount of lactose consumed and individual lactase activity. Some people can tolerate small amounts of lactose, but for others even small amounts can cause severe symptoms.

Diagnostic methods

Several methods are used to diagnose lactose intolerance:

• Lactose tolerance test: the patient is given a lactose-containing drink and the blood glucose level is measured. A reduced increase in glucose indicates intolerance, as it indicates insufficient breakdown and absorption of lactose.
• Breath test: measures the amount of hydrogen in the breath after consuming lactose. Elevated levels indicate lactose fermentation in the colon, as the bacteria produce hydrogen in this process.
• Stool pH test: with reduced stool pH may be associated with lactose intolerance, especially in children. An acidic pH indicates fermentation of sugars in the gut.

Establishing a diagnosis is essential to distinguish lactose intolerance from other digestive disorders and to develop an effective treatment plan.

Management of lactose intolerance

The management of lactose intolerance is mainly based on alleviating symptoms and ensuring a complete diet through dietary adjustments and the use of supplements.

Dietary changes

Dietary adjustment is the primary management strategy for lactose intolerance:

• Exclusion of lactose: Avoiding lactose-containing products such as milk, cheese and ice cream can be effective. However, it is important to ensure that the diet contains sufficient sources of other nutrients to prevent deficiencies.
• Lactose reduction: some people can tolerate small amounts of lactose, so it is recommended to use smaller amounts of dairy products. This helps maintain the variety of the diet and provide the necessary nutrients.
• Lactose-free products: consume products labeled as "lactose-free" or "lactose-reduced". These products usually contain lactose-free alternatives and are therefore suitable for people with lactose intolerance.
• Alternative dairy products: Use plant-based milks such as almond, soy or rice milk. These products are often fortified with calcium and vitamin D, which are important for bone health.

Lactose enzyme supplements

Lactose enzyme supplements, available as tablets or drops, can help digest lactose:

• Use of additives: they should be taken before consuming lactose-containing products to reduce symptoms. These supplements contain lactase, which helps break down lactose before it reaches the intestines.
• Variability of exposure: It should be noted that the effectiveness of supplements may vary from person to person. Different forms and dosages are available, so it is recommended to experiment to find the most suitable solution. Some people may need a higher dose to achieve symptom relief.

Psychosocial and lifestyle factors

Lactose intolerance can also affect psychological and social aspects of life. People with this condition may experience discomfort at social events where a limited menu is available. Also, emotional stress can exacerbate symptoms, so it's important to find ways to adapt and feel comfortable in social situations.

For example, planning and educating yourself about available foods can help reduce anxiety and ensure that appropriate dietary choices are available. Also, support groups or counseling can be helpful to help manage the emotional stress associated with dietary restrictions.

Possible complications

If lactose intolerance is not managed properly, it can lead to a number of complications:

• Nutritional deficiencies: Avoiding dairy products can lead to deficiencies in calcium and vitamin D, which are needed for bone health. A lack of calcium can negatively affect bone strength and increase the risk of fractures.
• Osteoporosis: a lack of calcium in the long term can lead to a decrease in bone density and the development of osteoporosis. Osteoporosis increases the risk of bone fractures and can be especially dangerous for older people.
• Digestive disorders: continuous consumption of lactose can cause chronic indigestion and discomfort. This can affect the functionality of the digestive system and cause additional health problems.

To avoid these complications, it is important to consult a healthcare professional and make appropriate dietary adjustments. This may include dietary supplements or alternative sources of nutrients to ensure adequate dietary variety and health.

Lactose intolerance in children

Lactose intolerance can also occur in children, although it is less common than in adults. In children, the symptoms may be similar to adults, but they can also cause additional problems, such as weight loss and stunted growth, if the diet is not balanced enough.

It is important to monitor your child's diet and make changes if necessary to ensure adequate calcium and vitamin D intake. Alternative sources of calcium, such as green leafy vegetables and fortified foods, can help provide the necessary nutrients. Parents should be careful to avoid over-exclusion of lactose if not necessary, as this may limit the variety and completeness of the child's diet.

A consultation with a pediatrician can be helpful in developing a nutritional plan that meets your child's individual needs and ensures healthy growth and development.

Comparison with other gastrointestinal disorders

Lactose intolerance is often confused with other digestive disorders such as irritable bowel syndrome (IBS) or celiac disease. IBS is a chronic intestinal disorder that causes abdominal pain and indigestion, but is not associated with intolerance to a specific food component. Celiac disease is an autoimmune disease that occurs in response to gluten. Unlike lactose intolerance, celiac disease can cause severe intestinal damage.

Although the similarity of symptoms can cause diagnostic problems, correct diagnosis and appropriate treatment are essential to ensure effective symptom management and avoid complications. Diagnostic tests, such as blood tests and biopsies, can help distinguish between these disorders and develop an appropriate treatment plan.

Conclusion and recommendations

Lactose intolerance is a common disorder that, although not life-threatening, can significantly affect daily life. Understanding the condition and effective management strategies can help reduce symptoms and improve quality of life.

Improving quality of life

To improve the quality of life for people with lactose intolerance, it is recommended:

• Get educated: get to know the nature of lactose intolerance and the available solutions. Understanding and managing symptoms can help reduce anxiety and improve quality of daily life.
• Dietary adjustment: consult a nutritionist about a diet plan that provides all the necessary nutrients. A dietician can offer alternatives and recommendations for a balanced diet.
• Experiment with products: finding suitable substitutes and testing different lactose enzyme supplements to find the most suitable one. A variety of foods and supplements can help reduce symptoms and improve dietary diversity.
• Psychological support: Seek emotional support and consider counseling to manage potential stress and discomfort. Support groups or psychological counseling can help you overcome the emotional challenges associated with lactose intolerance.

By implementing these strategies, individuals can successfully manage lactose intolerance and lead fulfilling lives. Managing lactose intolerance is an individual process and each person may need a different approach to ensure optimal quality of life.