Hypo-secretion, hyper-secretion, and BROWNIES? Help! Please OPEN! Please!?

My lab partner and I are doing a presentation on the parathormone. Other groups are bringing in goodies, and we already have freshly baked cookies. One plate with a lot of chocolate cookies [to represnt depressed serum calcium levels] and a lot of vanilla cookies [to represent increaed phosphate levels] for hyposecretion. We have a batch of brownies; how can we relate this? PLEASE HELP!