Therapeutic tattoo

Iron deficiency is common, but iron pills are hard to take - they cause stomach upset and constipation. Iron shots can be given, but if technique is bad, they stain tissue brown or even black (see link). These stains slowly go away as the body uses the iron, but are unsightly while they persist.

This property of iron could be used to advantage. I propose that folks whose iron intake does not meet their needs (for example - women with heavy menses) could have a cool tattoo done using iron as the pigment. This would look edgy and hip (as well done tattoos do), be billable to insurance as a health intervention, and would fade with time. When the tattoo had faded the woman would know that it was time for more iron - and maybe a cool, new tattoo!