Post-op Diet Booklet We have included our post-operative diet booklet for both Gastric Bypass and Lap Band on this website available as a PDF download. You can view the document online or download the file and print a copy. To view, download or save a copy click on the cover image on the right. GASTRIC BYPASS LAP BAND You will need Adobe Acrobat Reader to view the files on this page. This is a free download that will allow you to view Adobe PDF Documents.