What Protein In Milk Causes Allergy

What Is Cow’s Milk Protein Allergy

The most common symptoms of Cows’ Milk Protein Allergy (CMA)

Cow’s milk protein allergy is an allergic condition which is triggered by drinking cow’s milk or by drinking or eating products made from cow’s milk.

It can cause:

  • Skin symptoms, such as rashes and eczema
  • Gut symptoms, such as feeling sick , being sick and abdominal pain
  • Breathing symptoms, such as a runny nose and wheezing.

The symptoms are often vague and sometimes it is very difficult for a definite diagnosis to be made.

Cow’s milk protein allergy occurs in about 7% of babies who have formula milk, but in only about 0.5% of exclusively breast-fed babies, who also usually have milder reactions. Exclusive breast-feeding may also protect babies from developing an allergy to cow’s milk protein after they are weaned.

Cow’s milk protein allergy is more likely in children who have other allergic conditions such as asthma, eczema or hay fever, or if close family members have those conditions.

Risk Factors Of Milk Protein Allergies

There are a number of risk factors that may increase a persons chance of developing a milk protein allergy. These include a family history of milk protein allergies, as well as atopic dermatitis. Milk protein allergies are also more likely to appear in younger patients.

Finally, patients with other allergies are also more likely to end up with a milk protein allergy.

When Should You Contact A Doctor About A Milk Allergy

If you suspect that you or your child has a milk allergy, you should contact a healthcare professional either your own care provider or an allergist to be evaluated. If you have been diagnosed with a milk allergy, you should follow up with your allergist annually as new treatments are coming available.

If you have a milk allergy, epinephrine should be carried with you at all times. Also, you should always call 9-1-1 and go to an emergency room when you have used epinephrine, not because the medication is dangerous but because the reaction you are having is dangerous.

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Cows’ Milk Allergy In Babies

Cows’ milk allergy , also called cows’ milk protein allergy, is one of the most common childhood food allergies. It is estimated to affect around 7% of babies under 1, though most children grow out of it by the age of 5.

CMA typically develops when cows’ milk is first introduced into your baby’s diet either in formula or when your baby starts eating solids.

More rarely, it can affect babies who are exclusively breastfed because of cows’ milk from the mother’s diet passing to the baby through breast milk.

There are 2 main types of CMA:

  • immediate CMA where symptoms typically begin within minutes of having cows’ milk
  • delayed CMA where symptoms typically begin several hours, or even days, after having cows’ milk

Allergic Reactions / Doses

Signs Your Baby May Have Cows Milk Protein Allergy

The lowest dose of milk proteins/caseins that elicits an allergic reaction is not known. However, individual oral food challenge data can be compiled in order to estimate the proportion of the allergic population that would be likely to react to a certain dose of an allergen. The Swedish Food Agency has used such published data and developed a guide on how to calculate the risk of allergic reactions to certain concentrations of e.g. milk. The guide is in English and can be reached below .

The Swedish Food Agency has analysed concentrations of milk protein in food that have caused unexpected allergic reactions. The food and the descriptions of the allergic reactions have been sent to the Swedish Food Agency by the health care or by control authorities. A proportion of these reactions is presented in the table below. The presented examples are chosen in order to show that unexpected allergic reactions to milk protein can occur to different doses of milk, be caused by different food categories and cause different symptoms. The amount of food that has been consumed is estimated in most cases and the dose is thus partly estimated. Caseins constitute about 80 % of the total milk proteins.

The information in the table below, together with the risk assessment guide, can be used to estimate the risk that a certain concentration of undeclared milk constitute.

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Foods: What’s Allowed And What’s Not


  • All milks
  • Yogurt, eggnog, milkshakes, malts
  • All beverages made with milk or milk products


  • Wheat, white, rye, corn, graham, gluten and soy breads made without milk or milk products
  • Graham cracker and rice wafers

Not allowed:

  • Wheat, white or rye breads that contain milk
  • Biscuits, donuts, muffins, pancakes, waffles, zwieback, crackers, saltines that contain milk. There are now several mixes available that do not contain milk. Be sure to carefully read labels.
  • Most commercially prepared breads and rolls contain milk or milk products
  • French toast made with milk


  • Any cereal to which no milk or milk products have been added

Not allowed:

  • Prepared and precooked cereals with milk solids, casein or other milk products added


  • Meringue, gelatin, popsicles, fruit ice, fruit whip and angel food cake
  • Cakes, cookies and pie crusts made without milk or milk products such as Vegan desserts

Not allowed:

  • Cake, cookies, custard, pudding, cream desserts or sherbet containing milk products
  • Ice cream, cream pie
  • Scrambled with milk, creamed eggs or egg substitutes


  • Vegetable oil, meat fat, lard, bacon, shortening, milk-free gravy
  • Peanut butter
  • Salad dressing or mayonnaise containing milk, milk solids or milk products
  • Some butter substitutes and nondairy creamers


  • Fresh, frozen or canned fruits and juices

Not allowed:

  • Any fruits served with milk, butter or cream such as whipped cream

Meats, fish, poultry and cheese


Not allowed:

Not allowed:


What Milk Protein Causes Allergy

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Also to know is, what foods to avoid if you have a milk protein allergy?

Be sure to avoid foods that contain any of the following ingredients:

  • Artificial butter flavor.
  • Caseinates
  • Cheese, cottage cheese, curds.
  • Cream.
  • Custard, pudding.

Beside above, can adults have milk protein allergy? However, some people do not outgrow these symptoms and continue to be allergic as adults. It is unusual to develop an allergy to milk proteins later in life. However, the development of lactose intolerance tends to increase with age. Symptoms include bloating, pain, gas, diarrhea or gastroesophageal reflux.

Keeping this in consideration, what are the symptoms of milk protein intolerance?

Common signs and symptoms of milk protein intolerance or lactose intolerance include digestive problems, such as bloating, gas or diarrhea, after consuming milk or products containing milk.

What causes milk protein allergy in babies?

When a baby is allergic to milk, it means that his or her immune system, which normally fights infections, overreacts to proteins in cow’s milk. This causes an allergic reaction in which the body releases chemicals like histamine . Cow’s milk is in most baby formulas.

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Almond Milk Allergic Reactions

Switching from common milk to almond milk could also be buying and selling one allergic response for an additional. Tree nuts similar to almonds high the listing of allergy offenders. As well as, almost half of individuals allergic to peanuts are allergic to tree nuts.

In contrast to a cows milk allergy, which usually resolves at a really early age, tree nut allergic reactions are inclined to final a lifetime. Solely 9 % of youngsters will outgrow an allergy to almonds and different tree nuts.

Signs of a tree nut allergy might embrace:

Anaphylactic reactions to tree nuts are additionally extra widespread than with different kinds of allergic reactions.

Non Lge Mediated Symptoms

Cow’s Milk Protein Allergy Symptoms | Enfamil Canada

For milk allergy, non-IgE-mediated responses are more common than IgE-mediated. The presence of certain symptoms, such as angioedema or atopic eczema, is more likely related to IgE-mediated allergies, whereas non-IgE-mediated reactions manifest as gastrointestinal symptoms, without skin or respiratory symptoms. Within non-IgE cow’s milk allergy, clinicians distinguish among food protein-induced enterocolitis syndrome , food protein-induced allergic proctocolitis and food protein-induced enteropathy . Common trigger foods for all are cow’s milk and soy foods . FPIAP is considered to be at the milder end of the spectrum and is characterized by intermittent bloody stools. FPE is identified by chronic diarrhea which will resolve when the offending food is removed from the infant’s diet. FPIES can be severe, characterized by persistent vomiting, 1 to 4 hours after an allergen-containing food is ingested, to the point of lethargy. Watery and sometimes bloody diarrhea can develop 5 to 10 hours after the triggering meal, to the point of dehydration and low blood pressure. Infants reacting to cow’s milk may also react to soy formula, and vice versa. International consensus guidelines have been established for the diagnosis and treatment of FPIES.

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How To Treat Milk Protein Intolerance

Once you have confirmed your child has milk protein intolerance, it is important to learn how to manage it properly. Here’s what you can do:

1. For Breastfed Babies

If your baby has a milk allergy, it is important that you reduce the amount of dairy products you eat because it may transfer to your baby through your breast milk and may cause milk protein intolerance. Also, talk to your doctor about other alternative ways of providing your baby with enough calcium and nutrients.

2. For Babies Drinking Formula

If your baby is allergic to formula milk, you may consider switching to another formula, which should resolve the issue and the symptoms will go away completely in a couple of weeks. It is still important to give your baby a hypoallergenic formula until your baby is one year old.

Signs And Symptoms Of Milk Allergies

If your child is allergic to milk protein, it may cause symptoms in multiple areas of the body, including:

Skin: hives and may include mild to severe swellingLungs: difficulty breathing, shortness of breath, coughing or wheezingEyes: itching, tearing or rednessThroat: tightness, trouble breathing or inhalingStomach: repeated vomiting, nausea, abdominal pain and cramping, or diarrheaNose: congestion, copious clear discharge, sneezing or itchingNeurologic: change in behavior or mood, dizzinessDrop in Blood Pressure: This is the most dangerous symptom of a severe allergic reaction

If your child experiences any of these symptoms after consuming milk or dairy, call your pediatrician and arrange to have your child tested by a pediatric allergist.

If a child has any two systems involved from the above list, this means they may be experiencing anaphylaxis.

If your child has symptoms of anaphylaxis, call 911 immediately.

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What Causes Allergic Reactions To Milk

As with all allergies, a milk allergy involves the body having a strong reaction to a trigger. In the case of a milk allergy, that trigger most commonly is the alpha S1 casein protein in the milk. The body reacts to this protein by releasing histamines. These histamines, in return, trigger an immune response in the body.

This immune response causes a variety of symptoms including respiratory symptoms, digestive troubles, and itchiness. The cause of a milk allergy is very different from the cause of lactose intolerance, which is triggered by the lack of the lactase enzyme in the body.

What Is Cows Milk Allergy


Cows milk allergy is one of the most common food allergies in infancy and early childhood. It is a hypersensitivity reaction to one or more bovine proteins found in cow milk and dairy products.

When a baby is allergic to cows milk, their immune system, which normally fights infections, overreacts to one or more bovine proteins in milk. As a result, every time the baby drinks milk or eats dairy products, the body thinks these proteins are harmful invaders this causes them to have a reaction.

CMA is sometimes confused with lactose intolerance. Both can cause problems after drinking milk or eating dairy products, but they are very different and unrelated.

CMA is a reaction to the PROTEIN in milk, while lactose intolerance is a reaction to the SUGAR in milk. Therefore, lactose-free milk would not be helpful for a baby with suspected CMA. Of note, lactose intolerance is typically not found in babies.

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Talking To Your Healthcare Provider

If your baby has symptoms of an allergy to milk protein, it may be hard to determine if the cause is a simple upset stomach or an allergy.

Dont try to diagnose the issue or change formulas yourself. Consult your healthcare provider to get a proper diagnosis and to discuss treatment options.

Help your healthcare provider make the proper diagnosis with these tips:

  • Keep a record of your babys eating habits and symptoms.
  • If you breastfeed, keep a record of the foods you eat and how they affect your baby.
  • Learn about your family medical history, especially any food allergies.

Alternative Milks For Babies

Soy protein formula

  • Tolerated by most babies with cow’s milk allergy.
  • Unsuitable for babies allergic to soy.
  • Usually only recommended in babies over six months old.

Cows milk based extensively hydrolysed formula

  • EHF has been treated with enzymes to break down most of the cows milk proteins and it is usually the formula of first choice in cows milk allergic babies.
  • EHF is not suitable for babies who have had anaphylaxis to cows milk.
  • Some EHF brands are available without prescription.
  • An amino acid based formula is usually prescribed if a baby reacts to EHF.
  • Partially hydrolysed formula is not a suitable formula for babies with cows milk allergy as enough allergenic protein is usually present to trigger an allergic reaction.

Rice protein basedformula

  • May be used as an alternative formula to EHF or soy protein formula and continued or changed based on specialist advice.
  • Available without prescription.
  • Should not be used in babies with food protein induced enterocolitis syndrome to rice.

Amino acid based formula

  • AAF is necessary in around one in ten babies with cow’s milk allergy.
  • AAF is usually prescribed when an EHF or soy protein formula is not tolerated.
  • AAF is tolerated by most babies with cow’s milk and soy allergies.

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Treatment Options For Milk Protein Allergies

There are a wide range of treatment options for those with milk protein allergies. The first line of defense is to avoid exposure to milk products. Milk proteins may be present in many foods beyond a glass of milk, including baked goods and processed foods. Consulting with a doctor can help patients avoid any foods that can trigger an allergic response.

If a patient is inadvertently exposed to milk proteins that trigger an allergy attack, then an antihistamine can help relieve the bodys allergic response. In extreme cases involving anaphylaxis, immediate medical attention or the administration of injectable epinephrine via an EpiPen is necessary.

How Is Cows Milk Allergy Diagnosed

Allergy Tests to Diagnose Cow’s Milk Protein Allergy (CMPA)

The diagnosis of cow’s milk allergy is often obvious when symptoms occur within minutes of exposure. Skin prick allergen tests from your doctor can confirm the diagnosis. When symptoms are delayed, cow’s milk allergy can be harder to diagnose. Not every child who has a positive allergy test will develop symptoms when exposed to milk.

The Australasian Society of Clinical Immunology and Allergy recommends you should speak to your doctor or specialist about the benefits and safety of allergen immunotherapy or before attempting any allergy testing or treatment.

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Milk Allergy Vs Lactose Intolerance

The difference between a milk allergy and lactose intolerance is the involvement of the immune system. When a child has a milk allergy, the bodys immune system creates IgE antibodies to milk protein which lead to release of histamine and other chemicals that cause symptoms typical of allergic reactions

Lactose intolerance, on the other hand, involves more of the GI system. Those with lactose intolerance lack an enzyme that breaks down the sugars in milk and dairy products. This causes GI symptoms that may include nausea, cramps, gas, bloating and diarrhea.

What Protein In Milk Causes Allergy

A milk allergy is an immune response to one of many many proteins in animal milk. Its most frequently attributable to the alpha S1-casein protein in cows milk.

A milk allergy is usually confused with lactose intolerance as a result of they usually share signs. The 2 situations are very completely different, nonetheless. Lactose intolerance happens when an individual lacks the enzyme to metabolize lactose a milk sugar within the intestines.

Cows milk is the main reason for allergic reactions in younger youngsters and certainly one of eight meals which might be chargeable for 90 % of childhood allergic reactions. The opposite seven are eggs, peanuts, tree nuts, soy, fish, shellfish, and wheat.

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Sudden Milk Allergy In Adults

Can adults have a sudden milk allergy out of nowhere? Unfortunately, the answer is yes. Its not as common as it is with kids, but it does happen since our bodies are constantly changing. You might want to take a look at your family history to see if anyone else developed a sensitivity or allergy later in life. Many times, these things can be genetic.

What Can I Do To Stay Safe With A Milk Allergy


If you have a milk allergy, you must not eat or drink any products that contain milk or milk proteins.

Avoiding milk involves more than just leaving cheese off your sandwich. Be sure to read food labels carefully and not eat anything that you’re not sure about.

Milk and milk proteins can show up in unexpected places, such as processed lunchmeats, salad dressings, baked goods, chocolate, and crackers. Even foods that say non-dairy still may contain milk protein.

One thing that might not show up on a label is cross-contamination risk. Cross-contamination happens when a food you are not allergic to comes in contact with a food you are allergic to. This can happen if a manufacturer uses the same equipment to grind lots of different foods, for example.

Some companies put statements on their labels about the risk of cross-contamination, like: “May contain milk,” “Processed in a facility that also processes milk,” or “Manufactured on equipment also used for milk.” You’ll want to avoid products that have these kinds of alerts. But companies are not required to put cross-contamination alerts on a food label. So it’s best to contact the company to see if a product might have come in contact with milk. You may be able to get this information from a company website. If not, contact the company and ask.

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