Can You Drink Lactose Free Milk If You Are Lactose Intolerant?

The short answer is yes, most people with lactose intolerance can drink lactose free milk without developing symptoms.

Lactose free milk is specifically made for people who have difficulty digesting lactose, the natural sugar found in milk. By adding the enzyme lactase during production, manufacturers break lactose into two simpler sugars before the milk reaches your glass.

However, if you look closely at the nutrition label, you may notice that some lactose free milk still lists a very small amount of lactose. So what does this mean? And is lactose free milk really safe for people with lactose intolerance?

What Is Lactose Intolerance?

Lactose intolerance occurs when the small intestine does not produce enough lactase, the enzyme that breaks down lactose.

When lactose is not fully digested, it passes into the large intestine, where gut bacteria ferment it. This can lead to symptoms such as:

• Bloating

• Gas

• Abdominal pain

• Diarrhea

• Rumbling in the abdomen

The severity of symptoms varies from person to person. Some people can tolerate small amounts of lactose, while others are more sensitive.

How Is Lactose Free Milk Made?

Regular cow's milk naturally contains lactose.

To make lactose free milk, manufacturers add the enzyme lactase. This enzyme breaks lactose into two simple sugars:

• Glucose

• Galactose

Because these sugars have already been separated, your body no longer needs to produce as much lactase to digest the milk.

This is why lactose free milk is usually well tolerated by people with lactose intolerance.

Why Does the Package Sometimes Still Mention Lactose?

Many people are surprised to see that lactose free milk sometimes lists a tiny amount of lactose on the package.

This is completely normal.

No manufacturing process is perfect. Depending on the production method and the way lactose is measured, very small amounts of lactose may remain. In many countries, products sold as lactose free contain only trace amounts, often less than 0.1 gram of lactose per 100 millilitres, although the exact amount varies by manufacturer and local regulations.

These tiny amounts are much lower than the lactose found in regular milk, which contains around 4.5 to 5 grams of lactose per 100 millilitres.

For most people with lactose intolerance, these trace amounts are far too small to cause symptoms.

Can Trace Amounts Still Cause Symptoms?

For the vast majority of people, no.

Research shows that many people with lactose intolerance can tolerate up to about 12 grams of lactose in a single sitting, especially when consumed with other foods. This is roughly the amount found in one large glass of regular milk.

Because lactose free milk contains only trace amounts of lactose, it is usually well below the level that causes symptoms.

However, tolerance varies between individuals. A small number of people who are extremely sensitive may notice symptoms after consuming products containing even tiny amounts of lactose, although this is uncommon.

Does Lactose Free Milk Taste Different?

Yes, slightly.

Because lactose has been broken down into glucose and galactose, lactose free milk often tastes a little sweeter than regular milk.

This does not mean that extra sugar has been added. The amount of carbohydrate stays almost the same. Glucose and galactose simply taste sweeter to our taste buds than lactose does.

Who Should Not Drink Lactose Free Milk?

Lactose free milk is designed for people with lactose intolerance.

It is not suitable for people with a cow's milk allergy, because it still contains the same milk proteins, including caseins and whey proteins, that can trigger an allergic reaction.

If you have a milk allergy rather than lactose intolerance, lactose free milk is generally not considered safe.

The Bottom Line

Most people with lactose intolerance can safely drink lactose free milk.

Although the package may mention that a very small amount of lactose remains, these are usually only trace amounts that are far below the amount found in regular milk and are unlikely to cause symptoms for most people.

If you continue to experience digestive symptoms after drinking lactose free milk, speak with your healthcare professional. Your symptoms may have another cause, or you may have a different digestive condition that requires further evaluation.

Medical Disclaimer

This article is intended for educational purposes only and should not replace professional medical advice, diagnosis, or treatment. If you have ongoing digestive symptoms or suspect lactose intolerance or another medical condition, consult a qualified healthcare professional for an accurate diagnosis and personalized advice.

Sources

1. National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). Definition and Facts for Lactose Intolerance.

2. Misselwitz B, Butter M, Verbeke K, Fox MR. Update on Lactose Malabsorption and Intolerance: Pathogenesis, Diagnosis and Clinical Management. Gut. 2019.

3. EFSA Panel on Dietetic Products, Nutrition and Allergies. Scientific Opinion on Lactose Thresholds in Lactose Intolerance and Galactosaemia.

4. Paques M, Lindner C, editors. Lactose: Evolutionary Role, Health Effects, and Applications. Academic Press.

5. Fox PF, Uniacke Lowe T, McSweeney PLH, O'Mahony JA. Dairy Chemistry and Biochemistry. Springer.