Pretreatment with thyroxin 10(-8) and the effect of homeopathically prepared thyroxin 10(-30) on highland frogs--a multi-researcher study.

Background: Studies performed in 5 laboratories have shown that homeopathically prepared highly diluted thyroxin (10(-30)=30x) slowed down metamorphosis of highland amphibians. Metamorphosis of lowland amphibians, however, could be slowed down by a low dilution of thyroxin (10(-8)=8x) if animals had been artificially pretreated with thyroxin.

Objective: To combine the advantages of using animals from highland biotopes and hyperstimulation prior to treatment.