Final answer:
Using only sea salt may lead to an iodine deficiency, as sea salt typically lacks significant amounts of iodine, unlike iodized table salt.
Step-by-step explanation:
If you only use sea salt, you may be missing out on iodine, an element essential for human health. Iodine is crucial for thyroid gland function and preventing intellectual disabilities. Unlike sea salt, table salt commonly has iodine added to it (iodized), which helps prevent iodine deficiency disorders. Sea salt comes from evaporating seawater and typically does not include significant amounts of iodine unless specifically added. Therefore, people using exclusively sea salt should ensure they get enough iodine from other dietary sources, such as seaweed or dairy products.