Secondary 2 students did a simple experiment to test the nutrition in some foods such as rice, biscuits and tempeh. They used Biuret solution to test the protein, Benedict solution to test the glucose and Lugol solution to test the carbohydrates. Before the experiment, students hypothesized or predicted the nutrition contained in those foods. Then, they tested the foods based on the procedures. Discoloration is the parameter of this experiment. When the food changes into purple after being added with Biuret, meaning that it contains protein. When it changes into orange after being added with Benedict, it contains glucose and when it changes into dark blue after being added with Lugol, it contains carbohydrates.
Food test experiments are a valuable tool that enriches students’ scientific understanding while teaching life skills and health awareness. From this activity, students gain practical knowledge of how these nutrients are identified that builds a foundation in nutritional science. This experiment can also develop scientific skills that help them build accuracy, patience and problem-solving abilities. It is expected that students become more aware of the components of a healthy diet as they learn the importance of balancing different nutrients. ***
