I can’t speak to heart burn but I have tried fish oils that don’t have a fish taste. I like Carlson’s brand which comes in a few flavors (lemon and orange, possibly more flavors) You can read user reviews at the Amazon link: http://www.amazon.com/Carlson-Finest-Liquid-Omega-3-Bottle/dp/B001LF39RO/ref=sr_1_1?ie=UTF8&s=hpc&qid=1283573821&sr=8-1
I can take capsules w/o problems and I take the brand from costco (link)http://www.costco.com/Browse/Product.aspx?Prodid=11532928&search=salmon&Mo=8&cm_re=1_en-_-Top_Left_Nav-_-Top_search&lang=en-US&Nr=P_CatalogName:BC&Sp=S&N=5000043&whse=BC&Dx=mode+matchallpartial&Ntk=Text_Search&Dr=P_CatalogName:BC&Ne=4000000&D=salmon&Ntt=salmon&No=0&Ntx=mode+matchallpartial&Nty=1&topnav=&s=1
I didn’t know that you can buy vitamins over at amazon.com