GEM Impact is a powerful high energy tonic which contains a complex mix of absorbable iodines, active iron, cobalt, sodium molybdate and pure Vitamin B12 carried on a high energy base. GEM Impact liquid supplementhelps: Natural resistance Thyroid gland function Stimulates metabolism Purges the blood Produces pink clean skin GEM Impact should ideally be used twice a week during racing and three days a week to birds that are about to be paired up. Use at least once once a week in the stock loft throughout the year.