Jerseys naturally produce the highest quality milk for human consumption. Compared to average milk, a glass of Jersey milk has greater nutritional value: 15% to 20% more protein, 15% to 18% more calcium, and 10% to 12% more phosphorous, and also considerably higher levels of an essential vitamin, B12. This nutrient-dense Jersey milk tastes better. The reason is there are more solids-nonfat, protein, calcium and lactose in her milk compared to other breeds.