How can one check for adulterated sweets at home this Diwali?

Consumers can check Diwali sweets for possible adulteration using simple home tests. To detect starch, add iodine to a solution of the sweet and water. A blue or purple colour indicates its presence. Shake the solution vigorously to check for detergent, as dense lather may suggest adulteration. Heating silver foil can help distinguish silver from aluminium.