When patients presenting with symptoms related to constipation, diarrhea or IBS, Transit-Pellets radiopaque marker is prescribed to evaluate the transit time and how fast or slow food/stool travels through the intestines. The results generated from this test can quantify the severity of transit problems and help guide physicians in determining the need for additional diagnostic procedures or selecting the appropriate therapy. To undergo the Transit-Pellets test, a referral from a primary care physician or specialists is required. The Transit-Pellets capsules can be obtained from various locations, such as the doctor's office/hospital, pharmacy, or radiology center. Prior to usage, it is essential to read the Instruction for Use (IFU) included in each box of Transit-Pellets. As part of the Transit-Pellets diagnostic procedure, an X-ray is required on day seven.