Tamasic or impure foods have a negative and harmful effect on the body and the mind. They actually drain their resources. Tamasic diet is stale, spoiled, tasteless, non vegetarian, unhygienic and adulterated food, with preservatives, artificial color and flavor, tinned, pre-packed or pasteurized. They are also foods that lead to dependency, such as alcohol and tobacco. These make the person dull, lazy, drowsy and unable to think clearly.