{"id":564,"date":"2019-05-23T14:46:27","date_gmt":"2019-05-23T12:46:27","guid":{"rendered":"https:\/\/www.lactolerance.fr\/blog\/?p=564"},"modified":"2025-07-22T10:00:57","modified_gmt":"2025-07-22T08:00:57","slug":"symptomes-de-l-intolerance-au-lactose","status":"publish","type":"post","link":"https:\/\/www.lactolerance.fr\/blog\/en\/symptoms-of-lactose-intolerance\/","title":{"rendered":"The symptoms of lactose intolerance"},"content":{"rendered":"

 <\/p>\n

Lactose intolerance<\/b> is a common digestive disorder which affects 75% of the world's population<\/strong>. <\/span><\/p>\n

The symptoms<\/strong> of this condition, which results from a lack of <\/span>lactase<\/b>lactose, the enzyme needed to digest lactose, include bloating, diarrhoea, flatulence and other digestive discomforts. In this in-depth article, we will explore this disorder in detail, explain how to differentiate it from other digestive problems, discuss methods of diagnosis and explain how to treat it. present solutions such as taking food supplements.<\/strong><\/a><\/span><\/p>\n

I. Understanding lactose intolerance<\/b><\/h2>\n

1. Definition<\/b><\/span><\/h3>\n

Lactose intolerance<\/b> is a digestive condition in which the body does not produce enough food. d'lactase enzyme<\/a><\/strong> to correctly break down <\/span>lactose<\/a>milk sugar. <\/b>Lactase is produced naturally in the small intestine and is essential for digesting lactose. Babies produce an abundance of lactase to digest their mother's milk, but production gradually declines with age in many people. Lactose intolerance is therefore a natural phenomenon.<\/strong><\/span><\/p>\n

2. Lactose and lactase<\/b><\/span><\/h3>\n

Lactose is a complex carbohydrate found in milk, made up of glucose and galactose. To be properly digested, lactose must be broken down into these two simple sugars in the digestive tract. This is the role of <\/span>the enzyme lactase<\/a>.\u00a0<\/b><\/p>\n

3. History and development<\/b><\/span><\/h3>\n

Lactose intolerance<\/strong> was common among our prehistoric ancestors. After weaning, adults no longer consumed milk, which naturally led to lactose intolerance. However, this was not the case, <\/span>around 10,000 years ago<\/b>The domestication of cattle in the Caucasus led to an increase in milk consumption among adults, which in turn encouraged a genetic mutation that enabled part of the population to continue producing lactase. Today, it is estimated that\u00a0 <\/span>40% the number of lactose intolerant people in Europe<\/b>in France, nearly <\/span>5 million people are affected by this disorder.<\/b><\/p>\n

 <\/p>\n

\"Young<\/p>\n

And yes, this handsome, dark-haired fellow digested mammoths better than milk \ud83d\ude05<\/div><\/div>\n

II. Symptoms of lactose intolerance<\/b><\/h2>\n

1. Common symptoms<\/b><\/span><\/h3>\n

The symptoms of lactose intolerance result from the fermentation of undigested lactose by intestinal bacteria. The main symptoms include<\/strong> :<\/span><\/p>\n

a. Bloating<\/b><\/h4>\n

Bloating is caused by the accumulation of gas in the intestine, resulting from the fermentation of undigested lactose. This can manifest itself as abdominal bloating, gurgling, cramping and flatulence.\u00a0<\/span><\/p>\n

b. Heartburn<\/b><\/h4>\n

Heartburn can occur due to the build-up of gastric acid resulting from the fermentation of lactose.<\/span><\/p>\n

c. Diarrhoea <\/b><\/h4>\n

Acid diarrhoea is a common and often pressing symptom of lactose intolerance. Lactose fermentation disrupts digestion, which can lead to a precipitous evacuation of the alimentary bolus, with undigested stools, <\/span>in the 15 minutes to 4 hours following consumption of a milk-based food.<\/b><\/p>\n

d. Chronic fatigue<\/b><\/h4>\n

The symptoms of lactose intolerance, particularly when they are frequent, can lead to chronic fatigue. The body is overworked by the stress associated with the symptoms and the incomplete assimilation of food.<\/span><\/p>\n

e. More rarely<\/b><\/h4>\n

Nausea, vomiting, constipation and migraines.<\/span><\/p>\n

 <\/p>\n

Faced with such symptoms, lactose intolerance can represent a real handicap in everyday life. Severe intolerance can lead sufferers to cut themselves off from social life in order to better control their diet. In restaurants or among friends, patience and education are needed, because lactose intolerance is still little known in France.<\/span>.<\/em><\/span><\/strong><\/div><\/div>\n

2. Long-term consequences<\/b><\/h3>\n

The symptoms of lactose intolerance should not be taken lightly. Their recurrence can lead to irritation of the intestinal mucosa, depression and other health problems. Severe intolerance can greatly affect quality of life.<\/span><\/p>\n

 <\/p>\n

III. Distinguishing lactose intolerance from other digestive problems<\/b><\/h2>\n

It is essential to distinguish lactose intolerance from other digestive problems, as this can have an impact on diagnosis and treatment.<\/span><\/p>\n

1. Allergy to milk protein<\/span> \ud83e\udd5b<\/b><\/span><\/h3>\n

Lactose intolerance and milk allergy<\/a> are often confused, even though they are very different. Lactose intolerance is due to a lactase deficiency and does not involve the immune system. Lactose intolerance <\/span>milk allergy is an immune reaction<\/b> to certain proteins present in milk, such as casein. <\/span>Milk protein allergy generally affects infants and disappears naturally around the age of 3.<\/b><\/p>\n

Immunological reactions to milk allergy are generally more violent than those of lactose intolerance:<\/span><\/p>\n