Gaspard Adolphe Chatin proposed in 1852 that endemic goiter was the result of not enough iodine intake .
Eugen Baumann demonstrated iodine in thyroid tissue in 1896 .
Gaspard Adolphe Chatin proposed in 1852 that endemic goiter was the result of not enough iodine intake , and Eugen Baumann demonstrated iodine in thyroid tissue in 1896 .