This document discusses different types of food adulteration including intentional and unintentional adulteration. It provides examples of chemical and biological adulteration. It also discusses various types of meat adulteration such as adding water or ice to increase weight, using dead or diseased animal meat, and mixing organs to increase quantity. Some causes of adulteration are listed as high demand, lowering costs, and lack of training or outdated techniques. The effects of adulteration on health are described as injurious and able to cause diseases and deficiencies. Laws against adulteration in the US were introduced in 1938 and strengthened in 1954 and 2004.