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Doctor insights on: Dairy Allergy Or Lactose Intolerance

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Why do so many people think that lactose intolerance and dairy allergy are the same?

Why do so many people think that lactose intolerance and dairy allergy are the same?

Allergy not just GI: Dairy intolerance is caused by an inability to digest milk sugar lactose into two simpler sugars. This results in gas, cramps, bloating, flatulence & diarrhea. Dairy allergy may cause these same symptoms but typically also causes vomiting, skin rashes like hives or eczema & even triggers allergic rhinitis & asthma. If symptoms all GI try lactose-free milk. You'll have no symptoms if intolerant. ...Read more

Lactose (Definition)

Found in milk. Lactose is a large sugar molecule that is made up of two smaller sugar molecules, glucose and galactose. In order for lactose to be absorbed from the intestine and into the body, it must first be split into glucose and galactose. The glucose and galactose are then absorbed by the cells lining the small intestine. The enzyme that splits lactose into glucose ...Read more


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How is it that a lot of people think that lactose intolerance and dairy allergy are the same thing?

How is it that a lot of people think that lactose intolerance and dairy allergy are the same thing?

Food Allergy: Many people believe that any symptom triggered by a food is due to allergy. However, a true food allergy is due to an abnormal immune response to the food, triggering possible systemic symptoms such as oral and dermal itching, rash, throat swelling, wheezing and GI symptoms. An intolerance is due to reduced digestive enzymes, like lactase, causing GI symptoms like cramps, bloating and gas. ...Read more

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How can i be sure if i have dairy allergy? Or i if i am lactose intolerant. ? Is there any sure shot test?

How can i be sure if i have dairy allergy? Or i if i am lactose intolerant. ? Is there any sure shot test?

Can reliably tell: If you utilize a lactaid supplement. This supplement breaks down the mild sugar(lactose) that people with lactose intolerance have issues with in dairy. If Lactaid supplementation helps, then you know it's not a dairy allergy, as this allergy would be to specific milk proteins and not so much the sugar. ...Read more

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If you have a dairy allergy, is your chances of being lactose intolerant higher?

If you have a dairy allergy, is your chances of being lactose intolerant higher?

No: Lactose intolerance is a inherited metabolic problem in that the intestine lacks the enzyme to break down the lactose in milk. Milk allergy is also partly genetically predisposed but is not linked to lactose intolerance. There is a remote possibility that if the intestine gets inflamed enough by continuing exposure to a food allergen, the inflammation may lead to a transient lactose intolerance. ...Read more

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What is the difference between lactose intolerance and dairy allergies in babies? I am a mother of a 4 month baby, and when she was 1 week she was diagnosed with an allergy to lactose - the smear test came out with clotted blood hidden in the poop. As a

What is the difference between lactose intolerance and dairy allergies in babies? I am a mother of a 4 month baby, and when she was 1 week she was diagnosed with an allergy to lactose -  the smear test came out with clotted blood hidden in the poop. As a

Very different: Some babies are born with cow's milk protein allergy which they may grow out of. It can lead to blood in the stool, fussiness (gerd) or rash. Some with cows mp allergy also have soy allergy which means no milk intake for mom when nursing or a special formula for baby. Lactose intolerance happens later and is due to poor gut absorption of milk. It can lead to gassiness and loose stool. ...Read more

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How do I tell if my child may have milk allergy or lactose intolerance?

How do I tell if my child may have milk allergy or lactose intolerance?

Lab Tests or Symptom: Your child's doctor can run lactose-intolerance tests. However, the easiest way may be to remove lactose-containing foods/beverages from the child's diet and see if their symptoms improve. ...Read more

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When I eat milk products the next day i get a bbumpy itchy facial rash.is this allergy or lactose intolerance?

When I eat milk products the next day i get a bbumpy itchy facial rash.is this allergy or lactose intolerance?

Could be either: There is a continuum of reactivity to dairy products. Testing by either a dermatologist or an allergist could differentiate between sensitivity, intolerance and allergy. ...Read more

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How do milk allergies differ from lactose intolerance?

How do milk allergies differ from lactose intolerance?

Antibodies: People with a milk allergy develop antibodies to proteins in milk; every time they are exposed to those proteins (whether it's a little or a lot), they have a reaction. People with lactose intolerance are missing an enzyme that allows them to break down lactose; without the enzyme, the sugar in milk passes through their digestive tract unchanged causing symptoms. A little milk is often tolerated. ...Read more

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As a child i was allergic to milk, can I redevelop this allergy or is it lactose intolerance in adulthood?

Milk problem: They are two separate conditions but you may have been mis diagnosed and you have been lactose intolerant. You might try taking lactaid milk and see what your response is. ...Read more

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Is lactose intolerance a milk allergy?

Is lactose intolerance a milk allergy?

No: Lactose intolerance is a digestive problem with inability to break down complex milk sugars into simple sugars that are easy to absorb. Milk allergy is an ige mediated disease, usually manifest in children, with skin symptoms like hives and eczema, respiratory symptoms like asthma and rarely anaphylactic reactions. ...Read more

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How to check for lactose intolerance and gluten allergy?

Depends: Lactose intolerance is mostly a clinical diagnosis--usually leads to GI symptoms after eating foods containing lactose (dairy). Biopsy of the intestine can confirm the diagnosis as well. Celiac disease (gluten sensitivity) can be screened for with blood tests, and the confirmatory test is also a biopsy of the intestine. It's important that these tests be done while you're on a regular diet. ...Read more

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Difference between lactose intolerance and milk allergy?

Milk issues: Milk allergy causes hives, swelling of soft tissues such as lips and tongue, shortness of breath and in extreme cases anaphylactic reactions, it may also cause severe abdominal cramps. The effects are immediate after milk ingestion. While lactose intolerance can cause gas and bloating 1-2 hours after ingestion of dairy products and sometimes diarrhea. ...Read more

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Is lactose intolerance and a milk allergy the same thing?

Is lactose intolerance and a milk allergy the same thing?

No: Lactose intolerance is the inability to break down lactose due to endogenous deficiency of lactase, an enzyme that breaks down lactose into simpler sugars. On the other hand milk allergy is an IgE mediated antibody response which leads to histamine release from cells and the potential systemic symptoms of an allergic reaction. ...Read more

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What's the difference between lactose intolerance and milk allergy?

What's the difference between lactose intolerance and milk allergy?

Big difference: In lactose intolerance the small intestine can't digest lactose into glucose & galactose. These 2 sugars but not lactose can be absorbed. If lactose reaches the large intestine bacteria break it down to lactic & co2. Lactic acid causes diarrhea. Co2 is a gas causing bloating, cramps &...Well, gas. Allergy involves the immune system with symptoms like hives, eczema, asthma, vomiting & anaphylaxis. ...Read more

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Dr. John Chiu Dr. Chiu
4 doctors agreed:
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Need clarification: what is the difference between lactose intolerance and milk allergy?

Dr. John Chiu Dr. Chiu
4 doctors agreed:
Need clarification: what is the difference between lactose intolerance and milk allergy?

Enzyme and immunity: Lactose intolerance is due to a lack of lactase to break down the lactose thereby allowing it to get down to the large intestine where the bacteria start to use it leading to gas and diarrhea this may be corrected by taking lactase tablets ahead of time.Milk allergy is an allergic reaction. Often involves other systems . The only treatment is avoidance. Cooked product ok for 1/2 of the sufferers. ...Read more

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Can my peanut allergy and lactose intolerance be linked to each other?

Can my peanut allergy and lactose intolerance be linked to each other?

Probably not: Peanut allergy is allergy antibody ige against peanut proteins. Lactose intolerance is the inability to digest lactose a sugar in milk. These are two different pathophysiologic diseases. ...Read more

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Is there a test for lactose intolerance and milk allergy?

Is there a test for lactose intolerance and milk allergy?

Different for each.: Lactose intolerance can be proven with a breath hydrogen test, although usually if the symptoms resolve when off lactose and recur when lactose is reintroduced, that's sufficient proof. For milk protein allergy, skin tests, checking bm's for blood, blood allergy tests, and and elimination diet are used. ...Read more

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If u have mild milk allergy with prick test negative . The lactose intolerance breath test will be negative or positive ? Please reply thx ...

Two problems: The skin prick test looks for ige antibodies to a potential allergen. A negative test means allergy is much less likely, but skin tests can miss allergy. Lactose intolerance is not an allergy, so skin testing would not be helpful in a suspected case. The hydrogen breath test can be used to confirm lactose intolerance. ...Read more

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Can geographic tongue be caused by a food allergy or intolerance, such as celiac disease? Or lactose intolerance?

Can geographic tongue be caused by a food allergy or intolerance, such as celiac disease? Or lactose intolerance?

YES!: Although it is not always associated with those things, a high percentage of patients with celiac disease also have geographic tongue. It is not know why there is a correlation, but the correlation exists! if you have not been checked for celiac disease, ibs, or other gastrointestinal/autoimmune disorder, you may want to see your physician. ...Read more

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Today my lactose intolerance breath test of 5 hours result is positive but two years back with my blood test report was positive with food allergy ?

2 different things: Lactose intolerance is due to inability or decreased ability to digest milk sugar also called lactose. Allergy tests to milk indicate the presence or absence of ige to milk protein. In other words, allergy tests show if you have an allergy or sensitivity to milk protein and have nothing to do with lactose or milk sugar. You can be lactose intolerant and allergic to milk at the same time. ...Read more

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Hi,is it possible to have milk allergy and lactose intolerance at the same time?Because if I will drink cow and soy milk,the symptoms will be the same

Confusing question: Studies show that around 40% of those with bovine milk allergy will have a soy allergy. Lactose is the sugar in bovine milk and about 1/4 adults are lactose intolerant. Some confuse lactose intolerance with milk allergy,they are not the same.This can show up in childhood or emerge later. ...Read more

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Is milk protein allergy and milk protein intolerance the same thing? (Not talking about lactose intolerance).

Is milk protein allergy and milk protein intolerance the same thing? (Not talking about lactose intolerance).

No: you can have an intolerance with out having an allergy. An allergy can be occur when your body makes antibodies to the milk protein- and an intolerance doesnt necessarily have to be related to antibodies. The most common allergy is IgE mediated, with rash, swelling, hives. An intolerance may not cause those symptoms- they may cause diarrhea ...Read more

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What is the difference between lactose intolerance and milk protein intolerance? (I'm not talking about the milk protein allergy).

What is the difference between lactose intolerance and milk protein intolerance? (I'm not talking about the milk protein allergy).

Enzyme deficiency : Lactose intolerance is when the body cannot easily digest lactose, which is a sugar found in milk and dairy products.Lactose intolerance occurs when the small intestine does not make enough of an enzyme called lactase. Your body needs lactase to digest lactose. Milk protein intolerance is an allergy. ...Read more

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How 2 distinguish between baby acne, lactose intolerance, milk protein allergy, or soy allergy? I'm pumping + supplementing and don't know rash cause

How 2 distinguish between baby acne, lactose intolerance, milk protein allergy, or soy allergy? I'm pumping + supplementing and don't know rash cause

Rashes common: I'm assuming your baby is fairly new Rashes need to be seen for correct identification Most of the food sensitivities have intestinal symptoms as well such as gas, irritability. rashes in very young infants are common and you should see your doctor for a proper visual ID ...Read more

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I have a dairy allergy. I was recently prescribed lyrica (pregabalin). I sm experiencing some swelling of lips tongue and throat. Lactose monohydrate?

I have a dairy allergy.  I was recently prescribed lyrica (pregabalin).  I sm experiencing some swelling of lips tongue and throat.  Lactose monohydrate?

ER or urgent care: Lactose intolerance is different from milk protein allergy, you need to sort out the cause of lip / tongue swelling, and to stop any new drug for now, hold the lyrica, (pregabalin) please see/call your doctor if you are experiencing throat swelling , hoarseness or shortness of breath, even 911 /ER, epinephrine pen might need to be handy, can use OTC antihistaminic for now , good luck ...Read more

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How do you know if you're lactose intolerant weird gross things happen when I have dairy products like cream or milk allergenist says not an allergy ?


How do you know if you're lactose intolerant weird gross things happen when I have dairy products like cream or milk allergenist says not an allergy ?

Not an allergy: rather intolerance, allergy testing would be negative, intolerance would be to the sugar in the dairy, allergy to dairy is a reaction to the milk proteins ...Read more

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What's the difference between the diets of people with lactose intolerant and those dairy allergies differ?

What's the difference between the diets of people with lactose intolerant and those dairy allergies differ?

Nothing: Both need to avoid dairy. The lactose intolerant patient because they can't digest lactose the sugar in milk. The milk allergy patient b/c they are allergic to milk proteins and could have a life threatening reaction to milk. ...Read more

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Is it possible for you to have a milk allergy and be lactose intolerant?

Is it possible for you to have a milk allergy and be lactose intolerant?

Yes: Yes you can get both. Lactose intolerance individuals get abdominal cramp, gases, diarrhea when consuming milk or dairy products. Symptoms depend on the severity of your intolerance and the amount of milk you consume. Symptoms should resolve within a week of avoiding milk. Milk allergy in the other hand can cause hives, eczema, abdo pain, blood in stool, and worst, throat closing or anaphylaxis. ...Read more

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3 month old lactose intolerant, is it possible she has CMPI or an allergy also as symptoms persist on lactose free formula.

3 month old lactose intolerant, is it possible she has CMPI or an allergy also as symptoms persist on lactose free formula.

Likely CMPI: If your baby had an intolerance to regular formula (cows milk protein) then the likelihood of an allergy to soy protein is high.True lactose intolerance under the age of 3 yrs is rare. See: http://www.isitcowsmilkallergy.co.uk/getting-my-baby-diagnosed/cma-or-lactose-intolerance/ ...Read more

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Can you still get a complete, balanced diet if you have a gluten allergy and are also lactose intolerant?

Can you still get a complete, balanced diet if you have a gluten allergy and are also lactose intolerant?

Certainly: Throughout most of human history gluten-containing grains & dairy products were not consumed (& still usually not in asia). Gluten-containing grains (& other grains) are certainly not a necessary part of a healthy diet, and neither is dairy (though lactose-free dairy products like yogurt are an option). One can get all the nutrients needed from vegetables, fruits, nuts, seeds, beans, eggs & meats. ...Read more

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I have rash on my arms, chest, waist, groin & underarms. Doc says its eczema. Allergy report says i am NOT lactose intolerant. Can milk trigger eczema?

I have rash on my arms, chest, waist, groin & underarms. Doc says its eczema. Allergy report says i am NOT lactose intolerant. Can milk trigger eczema?

Eczema: Can be allergic or non-allergic, yes milk can trigger eczema in susceptible individuals, usually infants and children, and the allergy is to the milk protein rather, not to the milk sugar (the lactose). You need to be re-evaluated by the doctor who saw you, or have a second opinion, it's your right, see a dermatologist, goodluck ...Read more

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What is the difference in symptoms of dairy allergy vs. Dairy intolerance?

Allergy not just GI: Dairy intolerance is caused by an inability to digest milk sugar lactose into two simpler sugars. This results in gas, cramps, bloating, flatulence & diarrhea. Dairy allergy may cause these same symptoms but typically also causes vomiting, skin rashes like hives or eczema & even triggers allergic rhinitis & asthma. If symptoms all GI try lactose-free milk. You'll have no symptoms if intolerant. ...Read more

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The doctor said I have lactose intolerance. Dose that just mean I'm allergic to dairy products?

The doctor said I have lactose intolerance. Dose that just mean I'm allergic to dairy products?

No: Lactose intolerance generally means you do not have the enzyme needed for proper digestion and absorption of the main sugar in cow milk. You cannot digest it, but germs in your gut will and cause you gas, cramping and loose stools. You can likely digest things like sharp cheddar cheese, a dairy product where the lactose has been depleted by the creation of the cheese.It is not an allergy ...Read more

Allergy (Definition)

An allergy is an exagerated immune responce to a typically benign trigger. You can have allergic responces to many things like pollens, animal dander, foods, medications, among other things. Symptoms may be bothersome, but benign, or can be fatal. Not all reactions to exposures are allergies and if you think you may be allergic , i recommend being evaluated by ...Read more


Dr. John Chiu
2,720 doctors shared insights

Allergies (Definition)

Allergies occur when your immune system is triggered by envirionmental factors it should ignore--for example, pollen in the air, or dander on a cat or dog--and creates cells to fight against them. An allergic reaction typically causes itching, congestion, or drainage, and ...Read more