Holsteins have the lowest fat and protein content, while Jersey and Guernsey breeds have the highest. Because Holsteins produce more milk, they generally have a higher total yield of fat and protein than other breeds.

Jersey cattle

3 to 4 percent

Milk composition

Vitamin C

Milk is an excellent source of vitamins and minerals, including “nutrients of concern,” which are under-consumed by many populations ( 3 ). It provides potassium, B12, calcium and vitamin D, which are lacking in many diets ( 4 ).

Nutrients in Milk Milk contains calcium, vitamin D and potassium—three of the four nutrients that the U.S. Department of Agriculture deems underconsumed by most Americans.

Milk is an excellent source of vitamins and minerals, including “nutrients of concern,” which are under-consumed by many populations ( 3 ). It provides potassium, B12, calcium and vitamin D, which are lacking in many diets ( 4 ). Milk is also a good source of vitamin A, magnesium, zinc and thiamine (B1).

The Risks of Cow’s Milk

• Bleeding from the intestines during infancy. The intestines of some babies may bleed if they drink cow’s milk during their first year of life.
• Food allergies. About 2% of children are allergic to the protein in cow’s milk.
• Lactose intolerance. Lactose is the sugar found in milk.
• Heart disease.

Vitamin B12 is known to improve your memory power and sharpness. It is especially important in enhancing the overall brain development of a growing child. Due to its immense nutritive value and healthy fat content cow’s milk is associated with weight loss.

Milk and other dairy products are the top source of saturated fat in the American diet, contributing to heart disease, type 2 diabetes, and Alzheimer’s disease. Studies have also linked dairy to an increased risk of breast, ovarian, and prostate cancers.