Distribution of estimated iron requirements for men (♦) and women (▪): y axis represents the probability of adequacy (0–1), x axis is absorbed iron (mg/d).

<p>This is based on tabulated data from the IOM <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0111824#pone.0111824-Institute1" target="_blank">[11]</a>. The figure shows an interpolation of this data that was estimated using a spline function in R <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0111824#pone.0111824-R1" target="_blank">[17]</a>.