A1 vs A2 Milk: Understanding the Differences and Benefits

Increasing consumption of natural products and increasing awareness about functional beverages have made A2 milk has garnered attention from both consumers and scientists. A2 milk supporters claim that it is easier to digest and absorb than other milk types. According to FM’s analysis, between 2016 and 2020, A2 milk sales have grown at 6.1% CAGR.

You may be wondering "Does A2 Milk Make a Difference?" or "Is A2 Milk Worth the Money?" Well, this article will help you understand the difference between A2 milk and A1 milk so you can decide which one is the best for you!

A1 vs A2 Milk

A1 and A2 milk refer to the types of protein found in cow’s milk. A1 milk contains the A1 beta-casein protein, while A2 milk contains the A2 beta-casein protein. The main difference between A1 and A2 milk is that A1 milk may result in gastrointestinal problems while A2 milk might not.

A2 Milk May Help Reduce Gastrointestinal Discomfort in Some People
In humans, there is evidence from a limited number of studies that A1 consumption is associated with delayed intestinal transit (1 clinical study) and looser stool consistency (2 clinical studies). In addition, digestive discomfort is correlated with inflammatory markers in humans for A1 but not A2. However, further research is required in humans to investigate the digestive function effects of A1 relative to A2 in different populations and dietary settings. (Source)

A1 and A2 Milk Are Both Nutritious
In terms of nutrition, A2 milk is no different from A1 milk. Both milks contain the same essential nutrients, such as calcium, protein, and fats, and provide similar health benefits. 

A2 Milk May Increase the Production of the Antioxidant Glutathione
Glutathione is a potent antioxidant that is essential for many bodily functions, including immunological function, gene expression, and protection against oxidative stress. As a result, low glutathione levels promote early aging and the onset and progression of diseases like cancer, diabetes, heart attacks, Alzheimer's, and Parkinson's.

A study showed that milk containing only A2 β-casein and not A1 β-casein has the potential to promote the production of the antioxidant glutathione in humans.

How A1 & A2 Milk Are Produced?

A1 milk is produced by selecting cows that have been tested to produce the A1 protein, and then processing the milk as normal. A1 beta-casein can be found in milk from breeds of cows that originated in northern Europe such as Holstein, Friesian, Ayrshire and British Shorthorn

Whereas, A2 milk is produced by cows that produce only A2 beta-casein proteins in their milk. Cows are tested for the presence of the A2 beta-casein protein through a process called DNA testing. If the test is positive, then the cow is considered to be a producer of A2 milk only. A2 beta-casein can be found in milk from breeds of cows that originated in the Channel Islands and Southern France such as Guernsey, Jersey, Charolais and Limousin


Due to its production by smaller farms and the need for more specialized processing, A2 milk might be more expensive than A1 milk. However, prices can vary depending on where you purchase them.


There is no difference between A2 milk and A1 milk when it comes to consumption and use in different foods and recipes. 

You can use both A2 milk and ordinary A1 milk interchangeably while making milkshakes, smoothies, cereal bowls, coffee cups, homemade ice cream, and other foods.

Best A1 Milk

1. Organic Valley Whole Milk, 64 fl oz

Organic Valley Whole Milk, 64 fl oz


Half gallon of milk with 8 grams of protein per serving and essential nutrients. Natural butterfat mingles with the taste of organic pastures for a rich, creamy flavor. You can enjoy Organic Valley milk over cereal, in smoothies and milkshakes, or in a glass all on its own. 

USDA Certified Organic - we never use GMOs, antibiotics, synthetic hormones or toxic pesticides.

4.8 out of 5 - more than 5,600 global ratings

When I drink this (milk I flot off in a dream ) because I love this milk it brings back happy times in my childhood the silk taste, it freshness.

2. Parmalat Whole Milk 1 Qt

This vitamin D milk has a smooth and creamy flavor. Use it for basic needs like adding to cereal in the morning or for soup and sauce recipes. This Parmalat milk is also handy for making frostings, icing and integrating into various baking recipes.

Product Details
- vitamin D milk has a smooth taste
- carton is easy to pour from
- grade A
- ideal to keep for basic everyday needs
- use for cereal in the morning
- suitable for use in many baking recipes
- useful as a base ingredient for soups and sauces
- available quantities: single, 4-pack

4.5 out of 5 - more than 400 global ratings

I like milk and cereal on some days in the morning and I keep always a pack in the fridge to have cold milk. The taste is great and I like it that is shelf stable for month .

3. Organic Valley Grassmilk, 100% Grass Fed Organic 2% Reduced Fat Milk

One half gallon carton of Organic Valley Grassmilk Reduced Fat Organic 2% Milk. Organic grass fed milk that contains more naturally occurring omega-3s and CLA than regular milk

- reduced fat milk with the unique, seasonal flavors of lush, green pastures
- delicious with cookies or cereal or in a glass on its own
- USDA certified organic - we never use gmos, antibiotics, synthetic hormones or toxic pesticides

4.8 out of 5 - more than 3,000 global ratings

Can't get any better than grass fed cows living a stress free life roaming green grassy fields

You can definitely taste the difference

All Grass fed cows from this brand is a must try, the dairies are small family owned

4. Parmalat Shelf Stable 2% Reduced Fat Milk 1 Qt

Product Details
- vitamins A & D
- 38% less fat than whole milk
- 8g of protein per serving!
- fat reduced from 8g to 5g per serving

Our refrigerator and freezer went kaput and our younger grandkids were coming over. Bought these, put in ice chest. Kiddos had it on their cereal and the clincher for me was they drank the milk gone after the cereal was gone.

5. Organic Valley Ultra Pasteurized Organic Fat Free Milk

Ultra pasteurized milk with 10 grams of protein and 30% of the recommended daily value of calcium. Fat free skim milk with delicious, pasture raised flavor from small family farms. You can enjoy this non fat organic milk over cereal, in smoothies and milkshakes, or in a glass all on its own

USDA Certified Organic - we never use GMOs, antibiotics, synthetic hormones or toxic pesticides

4.8 out of 5 - more than 1,600 global ratings

My family doesn't go through a lot of milk, yet I like to have it in the refrigerator for baking and other uses. This Organic Valley ultra-pasteurized milk has a long refrigerator life while maintaining good flavor. Yes, it tastes a little different from the less expensive, non-ultra-pasteurized I sometimes buy, but I like the taste of this even better. It performs in recipes exactly like non-pasteurized milk.

-- Debbie Lee Wesselmann

Best A2 Milk

1. A2, Milk, Vitamin D Ultra-Pasteurized

- The A2 Milk Difference
A2 Milk Whole is 100% real milk from cows that naturally produce only the A2 protein and no A1. Published research suggests a2 Milk is easier on digestion and may help some avoid discomfort.

- We Love Our Cows
Our whole milk comes from cows that are never treated with growth hormone rBST. We partner with US farms that are Validus certified for animal welfare.

- Nutritious, Delicious Dairy
A2 Milk tastes great and is a top natural source for calcium, potassium and vitamin D, which helps keep bodies healthy and strong. The protein in milk can also help you feel full and keep you satisfied throughout the day.

- Striving for Sustainability
Our impact on the environment is important, so we only work with sustainable farms. From our recyclable cartons to our low-waste commitment, we work to consider our impact on the environment every step of the way.

- Commitment to Quality
We test every batch of our milk at various points throughout the process to help ensure our milk only contains the A2 protein and no A1.

4.8 out of 5 - more than 2,600 global ratings

Really enjoyed this milk without the upset stomach/bowels

2. A2 Milk 2% Reduced Fat

A2 Milk 2% Reduced Fat is 100% real milk from cows that naturally produce only the A2 protein and no A1. Published research suggests a2 Milk is easier on digestion and may help some avoid discomfort.

4.8 out of 5 - more than 2,600 global ratings

Non stomach upsetting milk, easily used for cereal and coffee for those who are lactose sensitive and don't want to give up cow milk

3. Alexandre Family Farms Organic Regenerative UHT A2 Whole Milk


Our Eco Dairy Whole Milk contains 4% mikfat – which is 24% more than the nationally standardized 3.25% milkfat in other Whole milk on the market. Our cool, coastal climate provides green grass 365 days a year – a constant source of nourishment for our unique blend of crossbreed cows, and results in milk with higher Omega 3s and CLAs (conjugated linoleic acids).

All our Alexandre Eco Dairy milks are ultra-pasteurized to give them an extended shelf life for staying fresh longer in your fridge!

Ingredients: Organic Whole Milk, Vitamin D3

4.8 out of 5 - more than 500 global ratings

After reading more into the benefits of A2 milk, I’m happy I found this organic brand because it’s made a world of difference. Sometimes I’d get a slight upset stomach or gas (sorry) but haven’t experienced anything negative after switching to this brand. I go out of my way just to purchase it :).


a. Can People With CMPA Drink A2 Milk?

A2 milk may be safe for people who are allergic to cow's milk protein (CMPA). A2 milk does not contain the A1 beta-casein protein, which is most commonly associated with CMPA. However, before introducing any new food or beverage into a person's diet, they should consult with a healthcare provider.



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