Define Natural Adulteration - Types of Adulteration?

These are the chemicals, organic compounds or radicals which are naturally present in the food and are harmful to the health. Some get destroyed by cooking and processing while others may enter in the body and cause disease e.g. many toxic varieties of mushrooms, fish, sea foods etc. A number of toxins are present in pulses and legumes like, saponins, trypsin inhibitors, haemaglutinins, alkaloids etc. Some of these are carcinogenic while others cause damage and malfunctioning of organs.