A1 or A2 Milk?—Choose Wisely

Author -  Larry A. Law

June 6, 2023
Print Friendly and PDF

Share this article:

Studies published over the years suggest it is wise to avoid milk completely or to consume it sparingly. In his landmark book, The China Study , Dr. Colin Campbell showed that the protein casein in milk was the number one consumed carcinogen on the planet. Regular consumption of this animal protein turned cancer on like a rheostat. The lower the level of casein consumption, the lower the risk of cancer. Additional studies have tied milk to autoimmune diseases like multiple sclerosis , rheumatoid arthritis , allergies , gluten sensitivities , and a host of other problems. Eliminating milk from your diet can seem like an impossible task. But there is hope and science which can help you minimize adverse effects if you just feel your body craving "Got Milk?" If you do opt for a little milk, make sure you get raw milk from local farms that raise their cows 100% grass-fed (no GMO feed!). Pasteurization creates dead milk devoid of anything living and nutritious. And one last note—make sure the milk is A2, not A1. What's the difference? Glad you asked.

Casein—A1 and A2

On pages 137-139 of my book, There's An Elephant in the Room—Exposing Hidden Truths in the Science of Health , I explain what constitutes A1 and A2 casein. Most milking cows (primarily the black and white Holstein) produce A1 casein in their milk. The older breeds (like brown Jersey cows) produce A2. Human digestive enzymes, which cut up and break down proteins, interact with A1 casein and form an inflammatory compound called beta-casomorphin (BCM-7). A2 casein is slightly different in composition and cannot be reduced to BCM-7. BCM-7 (like morphine) can create a 'feel good' response when you consume it and is likely to encourage a mild form of addiction while leaving your body in an inflammatory state. The pain from inflammation is masked by the BCM-7 compound, so you are unaware of the detrimental effects until they show up in seemingly unrelated conditions like lupus or diabetes. According to a study published in the journal Nutrition and Diabetes , A1 milk "is a primary causal trigger of type 1 diabetes." Researchers concluded that removing A1 milk from the diet "may profoundly affect type 1 diabetes incidence."

Switching to A2 Milk

A study published in the International Journal of Environmental Research and Public Health reported that the digestion of A2 casein resulted in many benefits and none of the harms associated with A1. BCM-7 produced in A1 milk lowers glutathione levels in the human gastrointestinal tract and in nerve cells. Glutathione is a powerful antioxidant and plays a major role in immune system response and disease progression. Consumption of A2 casein milk caused increases in this antioxidant. In addition, A2 milk significantly reduced gastrointestinal symptoms in preschoolers with milk intolerance and, as a side effect, resulted in improved cognitive ability. Because of increases in short-chain fatty acids levels, improved colon health resulted in better "fermentation products of gut microbiota with reported anti-inflammatory properties, able to amplify colonic cell function."

Bottom Line

A2 milk and cheese from cows, goats and sheep is becoming easier to find in the grocery stores. Make sure the products purchased say A2/A2 or 100% A2 so that there is no A1 milk hidden in the product. If you have issues with dairy, it might just be the ticket to keeping your cake and eating it too (with a small glass of A2 milk!).

Recent Posts

By Larry Law March 31, 2026
Kitchen cooking oils will not last forever. Depending upon the oil, it can go rancid in a matter of months or a few years. You don't want to cook with rancid oil because it smells like wet socks and the living components have lost their vitality. But the good news is, expired oil won't hurt you. There is no water in it, so no mold can grow to make it rotten and dangerous. It can still be used for creative applications. According to the United States Department of Agriculture Forest Service, “Vegetable oils have many good natural properties including good lubricity, good resistance to shear, a high flash point, and a high viscosity index.” These qualities make them quite versatile in a number of applications. You might consider keeping your old oil rather than throwing it out. Recycling expired oil could prove to be a valuable asset in emergency situations.
By Larry Law March 17, 2026
Disposable face masks, such as those health officials encouraged (or in some cases, mandated) the public to wear during the COVID-19 pandemic, are made of synthetic fibers and may contain chemical compounds. Many people have questioned the wisdom of wearing masks made of synthetic fibers for long periods, asking whether inhaling the chemical compounds masks release could lead to health problems.
By Larry Law March 3, 2026
Deaths from Alzheimer's more than doubled between 2000 and 2019. In 2023, nearly 7 million Americans have been diagnosed with the disease. Today, 1 in 3 seniors dies with Alzheimer's or dementia—the death toll exceeds the total of breast- and prostate cancer combined. Officially, it's the sixth-leading cause of death, but a 2014 study suggests that it is actually one of the top three (just behind heart disease and cancer). The discrepancy being how death certificates underreport the disese because they record the more immediate cause of death (pneumonia or heart attack) rather than listing the underlyings causes.
By Larry Law February 17, 2026
True confessions: I never liked flossing, so I rarely used the string. Angie used all of the flossing strings I collected from the dentist to cut the dough when making cinnamon rolls—I thought that was a better and tastier use! I always brushed my teeth (manually and with a battery operated toothbrush). My teeth felt clean enough, but still, I had a lot of dental guilt every 6 months when I had to admit I wasn't flossing. A few years ago, I found a device that removed all my guilt and shame! I discovered the waterpik. A waterpik (also known as a dental water jet) is a brand of water flosser or oral irrigator that sprays water to remove food from between your teeth. Water flossers are a fabulous option for people who have trouble with traditional flossing—the kind that involves threading string-like material between your teeth. The girl in the picture looks like me trying to floss!
By Larry Law February 3, 2026
Shingles is a viral infection caused by the activation of the varicella-zoster virus (VZV), also called human herpesvirus 3. That's the same virus that causes chickenpox. If you have ever had chickenpox, you were exposed to the varicella-zoster virus, which stays in your body for the rest of your life. If this occurs, the virus can reactivate as shingles years later. Being exposed to children with chickenpox keeps adult immunity up and reduces the chance of shingles in the future. Unfortunately, because we have largely eliminated chickenpox in kids, there is no repeated exposure to the virus to keep shingles at bay. The medical community has traded a kid's disease with few side effects for an adult disease with a lot of pain and discomfort. The VZV is a member of the herpes family of viruses. When shingles develops, it affects the nerves throughout the body resulting in painful, uncomfortable symptoms.
January 20, 2026
There are no easy answers for those who struggle with sleeping at night. Without a good night's sleep, our body's repair systems begin to struggle. A hormone we are familiar with has a little-known role in managing sleep. Cortisol is a steroid hormone that helps the body respond to stress and danger. It's also known as the "stress hormone" and is produced in the adrenal glands, which sit on top of each kidney. The hypothalamus-pituitary-adrenal axis regulates cortisol production and secretion. But I didn't realize it played an important role in keeping us from sleep.
By Larry Law December 9, 2025
Lupus is a chronic autoimmune disease that causes the body to attack its own tissues and organs, including the joints, skin, kidneys, blood cells, brain, heart, and lungs. According to traditional medicine, there is no cure for lupus. The work of the GRM demonstrates that there is hope through nutritional glycobiology. Current lupus medical treatments often target symptoms or broadly suppress the immune system, leading to side effects. However, Marina Zhang, an outstanding health reporter with The Epoch Times, reported that according to a Nature study published in 2024, science has discovered that patients with lupus have an imbalance in a crucial chemical pathway in their bodies. Researchers found that this imbalance produces more disease-causing cells that promote lupus. If this chemical imbalance can be corrected, they believe lupus can be reversed.
By Larry Law November 25, 2025
A recent study on sialic acid (a sugar) shines a bright light on an established risk factor for cancer. Scientists and doctors have known long-term consumption of red meat (beef, pork and lamb) is highly correlated to cancer. For years, researchers have looked for specific mechanisms in the meat that would cause human carcinomas. Grilling red meat was thought to create DNA damage due to mutagens, which are chemicals that mutate DNA. But that theory didn’t pan out. Grilling poultry and fish generates the same mutagens, but fish and poultry are not associated with an increased risk of cancer. ​
By Larry A. Law November 11, 2025
A false paradigm is a belief system that is incorrect. For centuries, people believed the sun went around the Earth. People looked up in the sky and it happened every day without fail. However, it was Copernicus in 1543 and Galileo in the 1600s who finally advanced the idea that what everyone saw each day was an illusion: the Earth actually went around the sun. Mark Twain stated, "It's not what we don't know that prevents us from succeeding; it's what we KNOW that just ain't so." I will discuss 5 false paradigms below.
Show More