The claims in the text describe a situation where supermarkets are allegedly selling meat that does not match its advertised quality, with accusations of undisclosed mixing of lower-grade imported products into premium-labeled packages. However, this is presented in a very generalized and sensational way, and no specific investigation, regulator report, or verified case is identified.

In real-world food supply chains, supermarkets typically rely on multiple layers of suppliers, including distributors and processors. Issues of mislabeling or substitution can occasionally occur in the food industry, but they are usually investigated and confirmed by food safety authorities such as the U.S. Food and Drug Administration or the U.S. Department of Agriculture before being publicly stated as fact.