iron

One wonders how the anti-GMO movement could oppose something like this. But given its hostility to Golden Rice, which has been genetically modified to contain a vitamin A precursor to prevent blindness, it usually finds a way.
More than a third of kids are using dietary supplements. Due to the many preventable, adverse drug reactions they cause – such as arrhythmias and cardiovascular events – researchers set out to quantify pediatric and adolescent intake.
An untreated iron deficiency could lead to various health problems, one being Iron Deficiency Anemia (IDA). Now, researchers have discovered IDA itself could be linked to another potential problem — hearing loss. 
Outside of the Western world, insect consumption is common. The Chinese, for instance, will eat just about anything that crawls on six (or more) legs. Centipedes and fried scorpions appear on the menu. Not only is entomophagy widespread, it's also probably healthier for people -- and the planet -- than eating other animals.