If you need a long-shelf life for your regular milk, you might be excited that you are seeing expiration dates longer into the future. We are seeing this especially in organic milk.
However, those longer shelf-lives come as a result of the milk going through the process of ultra high temperature (UHT) or being ultra-pasteurized. Are the advantages of organic milk being compromised by being UHT?
I learned the different pasteurization techniques via Alton Brown on an episode of Good Eats. The conventional process is 145°F for 30 minutes. Brown referenced HTST pasteurization (high temperature/short time), which is 161°F for 15 seconds. UHT is 280°F for 2 seconds and then cooled quickly.
Brown noted that low and slow is the way to go because it produces better flavor and body.
Nutrition is more important than taste, but a better tasting milk means more milk will be consumed, especially by children. Drinking milk is also about health above and beyond calcium and protein.
Scouring the Internet won't take you long to find articles about the evils of UHT pasteurization, such as altering the milk protein structure is altered and that UHT milk has less folate and could have reduced Vitamin B12, Vitamin C, and Thiamin.
From the Weston A. Price Foundation:
According to Lee Dexter, microbiologist and owner of White Egret Farm goat dairy in Austin, Texas, ultra-pasteurization is an extremely harmful process to inflict on the fragile components of milk. Dexter explains that milk proteins are complex, three-dimensional molecules, like tinker toys. They are broken down and digested when special enzymes fit into the parts that stick out. Rapid heat treatments like pasteurization, and especially ultra-pasteurization, actually flatten the molecules so the enzymes cannot do their work. If such proteins pass into the bloodstream (a frequent occurrence in those suffering from "leaky gut," a condition that can be brought on by drinking processed commercial milk), the body perceives them as foreign proteins and mounts an immune response. That means a chronically overstressed immune system and much less energy available for growth and repair.
If you like raw milk or want to have the milk as little pasteurized as possible, UHT milk goes to the other extreme.
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The UHT process doesn’t add nutrition to the process. UHT milk isn’t safer than regular pasteurization. The primary advantage to UHT is that grocery stores can increase profits. Less milk to throw out and more people will buy milk with a longer shelf life.
You can drink regular milk past the expiration date. Unless you take a long time to consume a container of milk, you almost never have to worry about spoilage. And if you need a long-term, shelf-stable milk, you can buy non-dairy milk.
Your food can be “too safe.” The U.S. has allowed irradiation of ground beef since 1999. Health Canada approved irradiation of ground beef last year but that information must be declared on the label. Irradiated ground beef might be "safe" but I wouldn't want to eat that beef.
We praise Europe’s food process, but the UHT wave comes from Europe. You might remember the Parmalat milk from the 1990s. Finding UHT milk is much easier in Europe, but then again, raw milk is easier to find in Europe.
If I’m going to drink milk, I want to get as much complete nutrition as I can in that glass. UHT milk makes buying and drinking milk less worrisome to some people, but provides no worthy reason where nutrition is concerned.
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