Fresh pork loin back ribs, also known as baby back ribs, are premium cuts from the center loin section of the pig. These ribs are notably meatier than standard baby back ribs, with Costco's ribs typically weighing 3 to 3.25 pounds per rack compared to the standard 2.75 pounds. The membrane on the bone side has been removed for easier preparation and better flavor penetration during cooking. These ribs are sold fresh and uncooked, perfect for grilling, smoking, or oven roasting. The package typically contains three racks totaling approximately 10 pounds. Nutrition per 4 oz raw serving: 194 calories, 24g protein, 11g fat (3.9g saturated), 75mg cholesterol, 107mg sodium. High in B vitamins including thiamin (47% DV), niacin (51% DV), and vitamin B6 (31% DV), plus excellent source of selenium (68% DV) and zinc (28% DV). Zero carbohydrates. Raw product contains natural pork.