2. Freshness and Bulk Buying
Since Walmart and Costco sell milk in high volumes, often in two-packs or large gallons, the risk of **spoilage** is a common topic. Some customers have reported that store-brand milk (like Walmart’s *Great Value*) sometimes **goes sour before the expiration date** . This can happen due to breaks in the “cold chain” during transport or simply because a household cannot finish such a large amount of milk before it naturally spoils.
3. Recent Safety and Testing Concerns
A more serious and recent reason for such warnings involves **changes in FDA testing**. In early 2025, reports surfaced that the FDA had suspended some of its quality testing programs for Grade A milk due to budget cuts and staffing losses [3]. This led to viral warnings on social media advising consumers to stick to specific brands like *Fairlife* or *Horizon Organic*, claiming that store brands from Walmart, Costco, and Aldi might not be as strictly monitored for pathogens or diseases .
