Milk

A glass of milk

Milk is a white liquid primarily produced by mammals, such as cows, dogs, and humans. It originates from the mammary glands of female mammals. Newborn mammals, lacking teeth, are typically nurtured with milk before transitioning to solid foods. Milk is packed with vital nutrients essential for the growth and health of the young. Additionally, milk serves as a primary source of calcium, which promotes bone and dental health.

Storage and Preservation

Milk's shelf life can be drastically reduced if not appropriately stored. Without refrigeration, it quickly turns sour. This souring results from the fermentation process where lactic acid bacteria convert milk sugars into lactic acid. The fermentation principle is foundational in the production of various dairy products.

To extend milk's shelf life and ensure it's safe for consumption, it's commonly pasteurised. This heat treatment eliminates harmful pathogens. Dairy products derived from milk include cream, butter, yoghurt, ice cream, and cheese. For best results, pasteurised cow's milk should be stored at temperatures between 1° and 4° Celsius. Ultra-high temperature (UHT) processing allows milk to remain unspoiled for prolonged periods, even without refrigeration until the seal is broken.

Lactose and Digestibility

Lactose, a sugar found in milk, can present digestive challenges for some. While infants produce an enzyme called lactase to digest lactose, its production may diminish in adults, leading to lactose intolerance. As a result, individuals might opt for lactose-free alternatives such as soy milk, which is derived from soybeans and is distinct from mammalian milk in its chemical composition.

Goat Milk

Goat's milk, produced by goats, offers both nutritive and culinary value. Consumed by humans and goat kids, it can also be processed into goat's milk cheese.

Coconut Milk

Distinct from animal-derived milk, coconut milk is a plant-based liquid that bears a white appearance similar to milk but with a distinct composition and nutritional profile. Extracted from the pulpy "meat" of coconuts, it's a common ingredient in cuisines worldwide, especially in dishes like Thai curry. Additionally, coconut cream is a denser version of coconut milk with added sugars.

Nutritional Value

Milk is a nutrient-dense beverage contributing significantly to daily nutritional requirements. With abundant calcium, it reinforces bone and teeth health. Milk is also a source of high-quality proteins and essential vitamins. However, certain dairy products like cream, cottage cheese, ricotta cheese, and cream cheese may have varying calcium contents.