Prepare a sample of food, transfer about 5cm (Cubed) into a test tube. Use a pipette to add 3 drops of Sudan III stain solution to the test tube and gently shake. The sudan III solution stains lipids, therefore, if the sample contains lipids, the mixture will seprate out into two layers. The top layer will be bright red. If no lipids are present, no seperate red layer will form.
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