How to Prepare for Your Fecal Occult Blood Test (FOBT)The FOBT is a home test and is similar to the FIT. One difference is that some foods/drugs should be avoided before the FOBT. This fact sheet provides additional information about FOBT, explaining how a colonoscopy may be needed if the FOBT results are positive. FOR PATIENTS or for distribution by HCPs, PAYERS and/or HEALTH SYSTEMS. Custom Logo Upload More informationFiles must be less than 2 MB. Allowed file types: gif jpg jpeg png. Back to Resources Download PDF