A significant increase in the serum calcium level was observed in the dogs injected with CKG or CG when compared to the controls. The maximum increase was reached within 15 minutes following the injection and was still slightly elevated 3 hours later. Similarly, a significant increase was observed in the monkeys injected with CKG or CG when compared to the controls. This increase reached a maximum within 5 minutes following the injections and returned to an approximately normal level within 90 minutes. Serum calcium levels are presented in Table below.