Part of the 24 hour iodine loading test kit. Bromines compete with iodine in the body and are therefore toxic to humans. It is essential to assess bromide toxicity when testing for iodine to see if bromide is blocking iodine and giving a false positive iodine result. You may see over 90-100% excretion of iodine after the iodine loading dose which means bromide is blocking its absorption and the person is unable to absorb iodine effectively. This requires a bromide detox protocol.