single-cell protein the tremendous increase in world population has led to a shortage of food supplies about 1/4 of world human population is suffering from hunger and malnutrition the conventional agricultural produce of cereals grains vegetables and fruits are not able to cater the demand of food and resources therefore alternative methods of raising food items have to be evolved one such method if single-cell protein single-cell proteins are the dried cells of protein rich micro organism which are used as protein supplement in human foods or animal feeds for example the blue-green algae spirulina and most common fungi mushroom spirulina is not only rich in proteins but also contains sufficient amounts of fats carbohydrates minerals and vitamins it is grown in starch rich wastewater from potato processing plants straw molasses animal manure and sewage this also reduces environmental pollution the most common source of single-cell protein is single-celled East's like Candida utilize and filamentous fungi like Fusarium Graeme Nerium a number of edible fungi like mushrooms are also consumed as food by people single-cell proteins are rich in protein and low in fat content which is a desirable feature of human food almost 40 to 55 percent single-cell protein body mass is made up of proteins some bacterias like methyl Oh Phyllis methyl orifice has 80% protein content