Neither. Milk is an input for butter. One does not use milk on toast instead of butter which would make it a substitute. Nor does one always eat milk with butter which would make it a complement.
dairy farming is where you milk cows so you have milk.
In the year 1916, the price of milk was $0. 09 a quart. Therefore, milk would have been about $0. 36 a gallon.
A dairy farmer makes very little on milk sold, if he sells it to a larger company. Typically the farmer will get about 10% of the retail value of the milk.
milk
oxytocin
no it causes cancer
Milk
Bacteria in milk causes milk to sour by changing lactose to lactic acid. This causes the pH to drop and once the pH drops low enough, the proteins in the milk will curdle.
Lactic acid causes muscles to ache
OT - Oxytocin from the posterior pituitary causes milk ejection
MI's Neghbor, WI.(Wisconson is the state that prodces the most milk). Acutally California produces the most milk by far. 36,465,000,000 pounds of milk per year most recent data. Wisconsin is 2nd with 22,085,000,000 pounds. I don't know why they measure it in pounds but that is the most recent US Dept. of Agriculture numbers.
It causes acitdity
Breast Milk
Cheese is really mole from milk
Prolactin
Enzymes such as "rennet".