Lorna Vanderhaeghe IronSmart - Highly absorbable iron supplement helps in the proper function and formation of red blood cells. IronSmart is non-constipating and does not cause digestive upsets as is common with most iron supplements. Ironsmart iron is wrapped in a liposomal bubble that allows the iron to pass through the high-acid stomach environment and go directly to the small intestine, where it is absorbed. Liposomal iron for iron deficiency anemia raises hemoglobin and ferritin fast and can be taken anytime.