Can a metallic bond with a sea of electrons form inside the human body? I’m interested if atoms or ions can for a metallic bond inside the human body?
I’m talking about a metallic bond as described here: https://www.britannica.com/science/metallic-bond
So I’m thinking of a metallic bond where the valence electrons of the atoms or ions are not associated with specific atoms or ions of the metallic bond. My understanding is that this is described as a sea of electrons.
If such a metallic bond can not form inside the human body, I would be very interested in the reason why. Thank you very much.
We may not produce nails from our bodies, but certain enzymes and proteins do involve metal clusters, especially clusters involving iron [1].  In the natural biomolecules iron-iron and iron-nickel compounds serve as functional groups for electron transfer.  Also discussed are iron-sulfur clusters, which have characteristics similar to all-metal clusters despite sulfur usually being considered a nonmetal.  Chemists have sought to mimic these natural cluster compounds with artificial molecules, not only using iron and nickel but also moving on to less common metals such as molybdenum and ruthenium.
Reference
1.
C. Fehl C and B.G. Davis, &quot;Proteins as templates for complex synthetic metalloclusters: towards biologically
programmed heterogeneous catalysis.&quot;, Proc. R.
Soc. A 472: 20160078. (2016)
Link