The Iodine is a trace mineral and chemical element that is highly important for both health and hygiene. It is widely known because the thyroid gland requires iodine to produce hormones that help regulate metabolism and support overall body function. Since the body cannot make iodine, people depend on external sources to fulfill their needs. The most common dietary source is iodized salt, introduced as a public health solution to help reduce iodine deficiency worldwide. Other food sources include fish, shellfish, milk, cheese, yogurt, bananas, and grains, depending on the iodine content of the soil where they grow. Iodine deficiency can create noticeable changes in the body, such as low energy, brain fog, dry skin, or thyroid swelling. That's why balanced iodine consumption is encouraged, especially during childhood and pregnancy, when the body needs it for physical and mental development. In addition to its nutritional benefits, iodine is also widely used as a disinfectant. Iodine solutions are applied to cuts and wounds to kill bacteria and prevent infections. Hospitals use it to clean the skin before surgery, and many first-aid kits contain small iodine bottles for emergency wound care. Chemically, iodine is unique because it can turn from solid crystals directly into vapor when heated, a process called sublimation. The vapor looks purple in color, a characteristic that makes iodine visually recognizable among chemical elements. Whether used for nutrition or sterilization, iodine has earned a strong reputation as a reliable, safe, and multi-purpose element when used correctly.