The most expensive milk in the world is produced by a company called A2 Milk. A2 Milk is a premium milk brand that produces milk that is free from the A1 protein, which is believed to be responsible for causing digestive problems in some people. The company’s milk is also higher in calcium and vitamin D than regular milk.
A2 Milk sells its milk for around $8 per half-gallon, which makes it more than twice as expensive as regular milk. However, many people believe that the price is worth it because of the health benefits associated with drinking A2 Milk.