What is the carbohydrate content in a serving of milk?

In a typical serving of cow's milk, which is usually measured as one cup (about 240 mL), the carbohydrate content is primarily from lactose, the natural sugar found in milk. The carbohydrate content of regular cow's milk is approximately 12 grams per cup. This is consistent across various nutritional databases and food composition tables, making the answer of 12 grams accurate for a standard serving size.

While the other answer choices might seem plausible, they underestimate the carbohydrate content commonly accepted for one serving of milk. Understanding the carbohydrate content in milk is essential for meal planning, particularly for individuals managing their carbohydrate intake, such as those with diabetes.