Report Extreme Fatigue After I Eat in Gastric Bypass Forums Posted Monday at 11:09 AM 12 hours ago, Rnwhy said: What Iron should we take? I take 18 mg Slow Release iron. I still bruise alot. This is a good thread (use the search option for more). It's worth the read: https://www.thinnertimesforum.com/topic/121129-iron-levels/?tab=comments#comment-1303986 This is what I wrote: "I took Carbonyl (and/or polysaccharide iron) because it's the least abdominally distressing (for me and most bariatric patients I know) and is 100% bioavailable so if you take 60 mg of carbonyl or polysaccharide iron, you'll get 60 mg of iron.....".