Milk is composed of 90% fluid with around 4% milk protein and 4% milk fat. Milk also contains important vitamins such as vitamin A and vitamin D along with minerals such as calcium, iron, magnesium and salt such as sodium and potassium.
When we consume milk, milk tasted slightly sweet with a mild taste of salt. It is sweet because it contains sugar based lactose. Sodium and potassium traces in milk contribute to the salty taste.
When we refer to nutrient profile, it is important to note that it is based on the documented lab analysis, ie the average amount found in the lab sample. The milk nutrient could be different based on the sources of the milk, seasons and the feeds for the cow. Other than obtaining milk from the cow, we could also obtain milk from buffalo, yak, goat, sheep and camel. Differences in sources would give us slightly different composition of milk nutrient and taste too.
Milk sources and its composition are important for further processing of the milk into dairy products such as cheeses.