Raw milk is milk that has not been pasteurized or homogenized. Health food proponents tout the benefits of raw milk and the ills of pasteurization and homogenization. Raw milk is the purest form of milk direct from the livestock, which comes naturally to you without being processed or treated.
  Side-effects of pasteurization
  Fans of raw milk (meaning milk that has not been pasteurized or homogenized) credit it with having more beneficial bacteria and enzymes than its processed counterpart. Raw milk does contain antimicrobial properties, which are destroyed with the heat of pasteurization, along with many of the vitamins within the milk itself .Raw milk consumption has also been shown to positively influence the immune system's resistance to the development of asthma, hay fever, and atopic sensitization, although the mechanism is not entirely understood