The Iodine is a non-metal element that belongs to the halogen family, but in daily life, it is best known as a health and hygiene essential. It is considered a trace mineral for the body, meaning it is needed in very small amounts but carries great importance. The thyroid gland uses iodine to make hormones responsible for metabolism, energy, brain development, and nerve function. Without iodine, these hormone levels drop, and this affects multiple functions of the body over time. Because iodine content in soil varies from place to place, natural iodine in plants also changes geographically. This led to the global adoption of iodized salt, which helps maintain healthy iodine levels even in regions where natural iodine in food is low. Seafood is naturally loaded with iodine because marine ecosystems contain abundant iodine in seawater. Fish, prawns, shellfish, lobster, and seaweed remain popular iodine-rich food options. Beyond nutrition, iodine’s disinfecting ability is one of its strongest features. Iodine solutions are used in first-aid care and hospital routines to sterilize the skin or clean wounds. Doctors apply iodine before surgeries to prevent infection from surface bacteria. One impressive scientific feature is iodine’s ability to sublimate, turning solid crystals into purple gas directly. This makes iodine visually striking. While iodine serves many uses, including pigments and medical imaging solutions, it must always be consumed or applied in approved amounts. This element represents one of the best examples of how chemistry serves both science and real-world human needs.