Abstract

1. The iodine of bladderwrack has a specific thyreotropic action; it is from 80 to 200 times as active as that of any other iodine compound studied (with the exception of the thyroid).

2. It is possible to distinguish, by means of physiological tests, between the iodine of the thyroid and that of bladderwrack and between the latter and that of other iodine compounds.

3. It is possible to obtain more marked physiological effects with mixtures of iodine compounds than with the latter alone.