"The subsequent trial found that, compared to the base blood iron rate at the beginning of the trial, individuals using the iron fish had increased levels of bl

"The subsequent trial found that, compared to the base blood iron rate at the beginning of the trial, individuals using the iron fish had increased levels of blood iron after 12 months, and the rate of anemia decreased by 43%.[5] A randomized control trial in 2017 found that the iron fish did not increase hemoglobin concentrations in a sample group of 340 Cambodian women." These sentences seem to contradict each other. Or does it mean that the concentration of iron in the blood has increased, but that it did not lead to more hemoglobin?