Chemical Form of the Iodine Present in the Hair of the Rat

The study investigates the hypothesis that thyroid hormones, which are rich in iodine, must be present in hair to promote its growth, as abnormalities in fur and hair growth retardation occur after thyroidectomy but can be reversed with thyroid preparations. Previous research has shown varying iodine concentrations in mammalian hair, with albino rats having significantly higher levels than other organs. This research aims to explore the chemical form of iodine in rat hair to understand its role in hair growth.