It's also not certain that the fish actually worked. The description of the trial as it was intended to work is here: https://clinicaltrials.gov/ct2/show/NCT02

It's also not certain that the fish actually worked. The description of the trial as it was intended to work is here: https://clinicaltrials.gov/ct2/show/NCT02341586 https://clinicaltrials.gov/ct2/show/NCT02341586 There appear to be no published results. There was another study: https://pubmed.ncbi.nlm.nih.gov/20110274/ https://pubmed.ncbi.nlm.nih.gov/20110274/ "Results: Blood iron levels were higher in women in the iron fish plus follow-up at 3 months compared with controls, but this was not maintained. At 6 months, haemoglobin and serum iron had fallen in all groups and the proportion of anaemic women had increased. Conclusions: This study shows that the iron ingot was effective in the short but not longer-term against IDA. Though a novel treatment option, further research is warranted to determine bioavailability of leached iron and whether or not the surface area is large enough for sufficient iron leaching. "