The oral liquid is awful-like licking rusted metal at a junk yard. A great trick I learned from an RD is mix it in with dark chocolate brownie mix (add dose per serving). I use King Arthur gluten free mix This my second time on iron. First time significantly improved restless leg symptoms

Updated labs revealed my iron levels had become depleted and so I went on Ferrous Sulfate 325mg 3x daily, prescribed by my PCP, which dramatically improved severe leg muscle pain, cramp, spasm. Not resolved but MUCH improved from where I was. May continue depending on next blood draw.