Your Milk Has a Code and Nobody Told You

Milk Comparison Summary

Cassandra, presenter of Becoming a Farm Girl, compares 11 kinds of milk costing about $63 in total. The products ranged from a $2.32 gallon of store-brand milk to a 59-ounce carton priced at $8.29—equivalent to $17.98 per gallon.

Her central point is that a carton’s price and marketing claims do not necessarily reveal who produced the milk, how it was processed, or what extra value it offers. A plant code, ingredient list, date, and the identity of any certifier can help answer those questions.

How the comparison was conducted

Cassandra says she:

• Bought 11 milk products from several retailers and compared prices per gallon and per serving.
• Read labels and ingredients, paying particular attention to plant codes, processing terms, certifications, and expiration or use-by dates.
• Looked up plant codes in the FDA’s publicly available Interstate Milk Shippers list.
• Consulted regulations, research, and reporting about milk claims and processing.
• Held a blind taste test with her husband.

The products discussed include Great Value whole milk, Aldi ultra-filtered milk, Lactaid, Giant/Nature’s Promise organic milk, Fairlife, Horizon Organic and grass-fed milk, Organic Valley, Alexandre A2, and Maple Hill.

Price, packaging, and the dairy market

Carton sizes varied. Several products labeled as half-gallons contained 59 ounces, while the Fairlife bottle contained 52 ounces. Cassandra recommends comparing price per gallon rather than relying on the package price.

At the prices she paid, choosing the cheapest milk instead of the most expensive for one gallon each week would amount to a difference of more than $800 a year.

She places the growth of premium milk in the context of declining U.S. milk consumption and fewer licensed dairy farms. In her view, the industry has increasingly offered specialty products and higher-priced options as sales of conventional milk have fallen. She also notes that whole-milk sales have been growing and says schools are again allowed to serve whole milk under newer rules.

Claims on cartons: what she says is formally defined

Cassandra says that, among the terms on the cartons she examined, only milk, ultra-pasteurized, and organic have federal definitions or oversight.

• Milk: She says whole milk must contain at least 3.25% milk fat.
• Ultra-pasteurized: She describes this as milk heated to at least 280°F for at least two seconds, with the processing method stated on the package.
• Organic: The USDA Organic seal carries specific requirements.

Terms such as grass-fed, A2, ultra-filtered, and lactose-free do not have the same federal definitions, she says. That does not necessarily make the claims false, but consumers may want to check which private certifier, company, or other party is responsible for verifying them.

What a plant code can tell you

Milk cartons carry a code identifying the facility where the milk was pasteurized or processed. Cassandra says the FDA’s Interstate Milk Shippers list can be used to look up the code.

The code identifies a facility, not the farms that supplied the milk. In her examples, the Great Value milk came from a plant in Baltimore; other products traced to plants in Colorado, Indiana, Idaho, New York, and elsewhere.

Horizon grass-fed and Maple Hill cartons had the same plant code. Cassandra says this reflects a common owner—Horizon’s parent company bought Maple Hill—not necessarily identical milk. Maple Hill was presented as certified grass-fed, while the Horizon product was organic milk with an added ingredient.

Her broader advice is to treat a matching plant code as useful information about where products were bottled, but not as proof that their contents are the same.

Pasteurization, shelf life, and cooking

Cassandra contrasts standard pasteurization with ultra-pasteurization:

• She describes regular pasteurization as heating milk to about 161°F for 15 seconds, and ultra-pasteurization as heating it to at least 280°F for two seconds.
• Ultra-pasteurization can give unopened milk a much longer refrigerated shelf life—sometimes one to three months. In her sample, the Great Value gallon had a use-by date 15 days after purchase, while some ultra-pasteurized cartons had dates many weeks later.
• She says Maryland’s sell-by-date rule for regular pasteurized milk let her infer that her Great Value milk was no more than three days old when she bought it. She notes that she could not make the same calculation for ultra-pasteurized products.
• She says ultra-pasteurization does not substantially reduce protein or calcium and causes only minor vitamin losses, but can produce a more “cooked” taste. She also says the altered proteins can make ultra-pasteurized milk unsuitable for some homemade cheese recipes that rely on rennet.
• For people who use milk slowly, she considers ultra-pasteurized milk practical. For cooking or cheese-making, she recommends checking the carton for the processing method.
• She also mentions vat pasteurization as a lower-temperature, longer-duration method and cautions that “low-temperature pasteurization” is not a legal term.

Organic milk

Cassandra describes USDA Organic rules for milk as requiring organic feed, no antibiotics or growth hormones, and at least 120 grazing days per year, with at least 30% of the cows’ diet coming from pasture during the grazing season.

She stresses that organic does not mean small-farm, local, or fully grass-fed, and that the rules do not set a herd-size limit. She compares store-brand organic milk with Horizon Organic, noting that both carried the same USDA seal. In her view, some package claims repeat requirements already associated with organic certification.

She also uses plant codes and company information to discuss suppliers and ownership structures, while cautioning that a brand’s packaging does not necessarily reveal the farm behind the milk.

Horizon’s DHA-added milk contained 32 mg of DHA per serving, according to the package. Cassandra compares this with the much larger amount in a serving of salmon. She concludes that the added DHA may matter to some shoppers, but considers the health-related wording more prominent than the amount itself warrants.

Grass-fed milk and nutrition

Cassandra says “grass-fed” has no federal milk-labeling definition, so she recommends looking for a named third-party certifier. The grass-fed products she examined had certifications that she says required:

• No grain in the cows’ diets.
• At least 60% of the diet from pasture during the grazing season.
• At least 150 days of grazing.

She contrasts those requirements with the organic standards she described: 30% pasture during the grazing season, 120 grazing days, and organic grain permitted. She also notes that Organic Valley is a farmer-owned cooperative, while Maple Hill and Horizon share a parent company.

On nutrition, she says research generally finds that milk from grass-fed cows has more omega-3s and conjugated linoleic acid (CLA), and a lower omega-6-to-omega-3 ratio, than conventional milk. She gives approximate figures from the video:

• Conventional milk: about 25–50 mg of omega-3s per serving.
• Organic milk: around 80 mg per serving.
• Grass-fed milk: roughly 90–120 mg per serving.

She warns that the serving-level omega-3 amount is still small compared with foods such as salmon or walnuts. The research she discusses includes work partly funded by Organic Valley, as well as independent laboratory testing and a University of Vermont study.

Other practical points she raises:

• If buying grass-fed milk for its fat profile, she recommends whole milk; she says much of the fat—and the associated nutrients—is lost in lower-fat milk.
• Check whether vitamin D is added. Some cartons in her comparison listed it, while Maple Hill did not.
• She says whole milk contains more vitamin K2 than skim milk, while noting that whether grass-fed milk contains more K2 has not been established in the research she found.
• She treats the golden color of grass-fed milk as an interesting feature, not a reason by itself to pay more.

Her conclusion is that certified grass-fed milk can be worth its higher price for shoppers who value the verified farming method and different fat profile, but it should not be viewed as a substitute for nutrient-dense foods or supplements.

Lactose-free, A2, and ultra-filtered milk

Lactose-free milk

Cassandra explains that Lactaid and similar products add the enzyme lactase, which breaks lactose into simpler sugars; the lactose is not simply removed. The sugar amount on the label can remain similar to that of regular milk, while the milk tastes sweeter.

In her comparison, Aldi’s store-brand lactose-free milk had the same three listed ingredients as Lactaid—milk, lactase, and vitamin D3—but cost less. Her practical suggestion is to try a store-brand lactose-free product before paying extra for the name brand.

A2 milk

A2 milk comes from cows selected to produce the A2 form of a common milk protein. Cassandra stresses that it still contains lactose.

She describes a review of 25 studies as finding moderate evidence that A1 protein may cause more digestive discomfort than A2, but notes that many studies were small and some were sponsored by the A2 brand. She presents A2 as a possible next option for people whose symptoms are not helped by lactose-free milk, rather than as a proven solution to all stomach problems.

Ultra-filtered milk

Cassandra says ultra-filtering separates milk components and recombines them in different proportions, producing milk with more protein and less sugar than conventional milk.

Fairlife’s label showed 13 grams of protein and 6 grams of sugar per serving. Aldi’s comparable product showed 14 grams of protein and 7 grams of sugar, with a similar ingredient list.

She says regular milk remains a cheaper source of protein, but ultra-filtered milk may suit people who want more protein and less sugar or who need a lactose-free option. Aldi’s version was less expensive per ounce than Fairlife at the prices she checked, and she notes that other brands were beginning to offer similar products.

Brand history and animal-welfare concerns

Cassandra discusses animal-welfare reporting and legal cases involving farms that supplied Fairlife, as well as an investigation and legal proceedings involving an Alexandre A2 supplier. She distinguishes between allegations, findings, company responses, and court outcomes, and says packaging is not the same as an inspection report.

Her takeaway is that shoppers who care about animal welfare should look beyond a brand name or picture of a cow and examine available audits, sourcing information, and reporting.

She also describes Fairlife’s ownership and Coca-Cola’s investment in the company, citing SEC filings. Her discussion is intended to provide context about the scale and history of premium milk brands, not to suggest that all products from a particular company are identical.

Blind taste test and final recommendations

Cassandra and her husband had different preferences, which she connects to the kinds of milk they grew up drinking. She preferred a richer, creamier taste, while her husband—who grew up on 1% milk—preferred less richness. Both liked some grass-fed options, but Cassandra also enjoyed regular Great Value and organic whole milk. They were not enthusiastic about all ultra-filtered options; some tasted unusually sweet or different from the milk they were used to.

Her final shopping categories were:

• Skip the extra cost: Lactaid when a less expensive store-brand lactose-free option has the same ingredients; Horizon DHA milk if the added DHA is not worth the extra cost to the shopper; and Fairlife at a higher-priced retailer when it is available for less elsewhere.
• Worth considering for a specific need: Store-brand lactose-free milk for lactose intolerance; ultra-filtered milk for more protein and less sugar; A2 milk if lactose-free milk does not help; ultra-pasteurized milk for a longer unopened shelf life; and store-brand organic milk for shoppers who want the USDA Organic standard.
• Worth considering if it fits the budget: Grass-fed milk with a named certifier, especially for shoppers who value the farming method and want whole milk.
• Her everyday choice: Regular store-brand whole milk. She says it was inexpensive, nearby, relatively fresh by her estimate, useful for cheese-making, and the taste she preferred.

Her key advice is to turn the carton over, check the plant code and label, and choose based on what you actually value and enjoy—not price or packaging alone.

Speakers and sources featured

Speakers

• Cassandra, presenter and narrator of Becoming a Farm Girl.
• Cassandra’s husband, who participated in the blind taste test; Cassandra describes his comments.

Sources and references cited or discussed by the presenter

• FDA’s Interstate Milk Shippers list, used to look up plant codes.
• USDA organic rules, USDA program actions, and USDA milk-price data.
• A Kroger dairy manager, quoted in a story about milk’s low markup.
• A Minneapolis reporter, whose plant-code comparison Cassandra references.
• A Penn State professor, discussed through an article in Scientific American about organic milk and transportation.
• A 2017 study in the Journal of Dairy Science on taste preferences for regular versus ultra-pasteurized milk.
• Studies on grass-fed milk nutrition, including research partly funded by Organic Valley, independent laboratory testing, and a University of Vermont study.
• A review of 25 studies on A1 and A2 milk protein.
• Coca-Cola SEC filings concerning its investment in Fairlife.
• Vox reporting on Fairlife claims.
• Animal-rights investigations, external audits, lawsuits, and related court proceedings discussed in connection with Fairlife suppliers and an Alexandre supplier.
• A patent filed by the founders of Fairlife, cited in the explanation of ultra-filtration.