In days gone by before homogenization, the cream always rose to the top. Today, most milk is homogenized. Homogenization ensures that the cream is thoroughly mixed throughout the product so that it does not separate out. This process doesn't alter any of the nutrients found in milk. Throughout the entire process from the time the cow is milked until the milk is packaged, milk is never touched by human hands.
Milk is natural - nothing is added except vitamin A and D which is required by law.
Milk remains one of the purest and safest foods available. All milk contact equipment is cleansed and sanitized on a daily basis - failure to do so would result in bacterial spoilage before the code date. Every dairy and their employees who work in the processing area must be licensed. Milk is packaged within days, usually within 24 hours, of arriving at a dairy plant. Packaged dairy products are also regularly tested by a certified laboratory for composition to ensure the product contains what it claims.