Formalin is a chemical solution made of formaldehyde and methanol, commonly used in food preservation in Bangladesh but poses significant health risks, including cancer. Studies reveal widespread formalin contamination in fish, fruits, and other food items, leading to public health concerns and changing consumer habits. Shwapno, a major retail chain, advocates for formalin-free products using detection technology to ensure food safety and enhance consumer awareness about the dangers of formalin in food.