Thyroxine and Antithyrotoxic Effects in the Chick

Abstract

Concentrates prepared from soy protein, lactalbumin or liver residue retained their antithyrotoxic activities but no longer had any chick growth-stimulating properties, and the two “factors” are, therefore, not identical. Most substances which exhibited good antithyrotoxic activity in the rat also had some protective effect in the chick. The administration of thyroid hormone to chicks or ducks had no effect on the basal metabolic rate or on the α-glycerophosphate dehydrogenase activity in any tissue studied.