Dairy

Facility for the production and processing of milk

A modern dairy campus in the Netherlands

Dairy refers both to a type of agricultural facility and to the category of food products derived from milk. In the agricultural sense, a dairy is a place where cattle, especially dairy cows, are raised for the purpose of producing milk. Milk harvested from these animals is processed into a variety of dairy products including cheese, butter, yogurt, cream, and more.

Dairy plays a central role in human nutrition and food culture, providing essential nutrients such as calcium, vitamin D, potassium, and protein. Dairy farms can range from small, family-run operations to large-scale industrial facilities.

Nutrition

Glass of milk on tablecloth

Dairy products offer a rich source of vital nutrients important for growth, development, and maintaining health throughout life.

• Calcium – Essential for the development and maintenance of strong bones and teeth. It also plays a role in muscle contraction, nerve transmission, and blood clotting.
• Potassium – Helps maintain healthy blood pressure and is found in fluid milk, yogurt, and soymilk (soy beverage).
• Vitamin D – Supports the absorption of calcium and phosphorus. Fortified milk and soymilk are important sources. It also plays a role in immune function.
• Protein – Found abundantly in milk, essential for the building and repair of body tissues.
• Riboflavin (Vitamin B2) – Important for energy production and cellular function.
• Vitamin B12 – Supports the production of red blood cells and neurological function.
• Phosphorus, magnesium, zinc, selenium, and choline – Important for a variety of metabolic processes and cell signaling.

Consuming three cups (or the equivalent) of low-fat or fat-free dairy products daily is recommended in many national dietary guidelines.

Health Benefits

The regular consumption of dairy products offers several documented health advantages:

• Supports the development of peak bone mass in children and adolescents, reducing the risk of osteoporosis later in life.
• Contributes to cardiovascular health when consumed in low-fat or fat-free forms.
• May help lower blood pressure when part of an overall healthy eating pattern.
• Provides a high-quality protein source for muscle maintenance and repair.
• Certain fermented dairy products like yogurt contain probiotics which may support gut health.

Dairy Products

Various dairy products including cheese, milk, and yogurt

The most common dairy products include:

• Milk – Available in whole, low-fat, and skim varieties.
• Cheese – Includes hard, soft, aged, and fresh cheeses made from different types of milk.
• Butter – Made by churning milk or cream to separate the butterfat.
• Yogurt – Produced by fermenting milk with specific bacterial cultures.
• Cream – A rich, fatty part of milk that rises to the top and can be processed into products like whipped cream or sour cream.
• Ice cream – A sweetened, frozen dairy dessert made from cream or milk.

Saturated Fat and Cholesterol

While dairy offers numerous health benefits, it's important to manage intake of certain components:

• Some dairy products, such as whole milk and full-fat cheese, are high in saturated fat and cholesterol.
• Diets high in saturated fat can raise LDL cholesterol (low-density lipoprotein), often referred to as “bad cholesterol,” which increases the risk of coronary heart disease.
• Choosing low-fat or fat-free options reduces intake of saturated fat without compromising nutritional benefits.
• High intake of fat-rich dairy may contribute to excess caloric intake, which can lead to obesity if not balanced with physical activity.

Dairy Alternatives

For individuals who are lactose intolerant or who follow a vegan diet, several non-dairy alternatives are available:

• Soymilk, almond milk, rice milk, and oat milk are plant-based milk alternatives, often fortified with calcium, vitamin D, and B12.
• Non-dairy yogurt, cheese, and ice cream alternatives are also commonly available.

Dairy Industry

The dairy industry encompasses the production, processing, and distribution of milk and milk-based products. It is a major sector of the agricultural economy in many countries. Major concerns related to the industry include:

• Animal welfare
• Environmental impact – including greenhouse gas emissions and land use.
• Sustainability practices – such as water conservation and feed efficiency.

Dairy and Public Health

Health authorities such as the World Health Organization and the United States Department of Agriculture advocate for the inclusion of dairy in a balanced diet. However, public health recommendations also encourage limiting saturated fat by choosing low-fat or non-fat options.

See Also

• Milk
• Dairy farming
• Lactose intolerance
• Cheese
• Butter
• Yogurt
• Calcium
• Vitamin D
• Protein
• Vegan nutrition