What is the difference between toned milk and full cream milk?

This was the two classifications of packet milk.


There is a difference in cost also.What is the difference between toned milk and full cream milk?
Toned milk have 2.5 to 3.5% fat in it.Cream Milk have 5 to 7% of fat,These standers vary in different countries.


Then there is skimmed milk with no fat in it.