A connected research series
The body does more than remove metals. It decides where they go, what binds them, and who can reach them.
These deep dives follow metal handling from a molecular interaction to a biological consequence. The central question travels across infection, inflammation, drug metabolism, and exposure: which metal pool changed—and for whom?
5 deep dives
Binding, occupancy & microbial access
A host protein that locks away iron can become an iron source for microbes carrying the right receptor.
In Neisseria gonorrhoeae experiments, functional LbpA enabled use of lactoferrin-bound iron. [1]
This is receptor-dependent laboratory evidence, and clinical isolates differ. It does not mean lactoferrin feeds all pathogens or that oral supplementation increases infection risk.
Read the full investigation →Iron redistribution & inflammation
A fall in blood iron can reflect iron being retained inside cells, rather than iron disappearing from the body.
Hepcidin controls the export protein ferroportin, changing which compartments receive the metal. [2] [3]
This is iron redistribution, not a diagnosis from a blood test. Infection outcomes depend on the organism and the pool it can reach.
Read the full investigation →Transport, storage & recycling
A host can survive an infection better without reducing the number of parasites.
In experimental mouse malaria, heme oxygenase-1 protected the liver through disease tolerance, showing why iron handling must be judged by host injury as well as pathogen counts. [4]
P. chabaudi chabaudi mouse models; this is not proof that increasing HO-1 treats human malaria.
Read the full investigation →Redox chemistry, organelles & medicines
Normal total glutathione can conceal a mitochondrial shortfall, as SLC25A39 knockout experiments showed.
Drug–metal research should measure delivery and chemical species, not assume a whole-cell antioxidant measurement reveals every vulnerable pool. [5]
Demonstrated in experimental mammalian cell systems; this does not establish mitochondrial glutathione failure during ordinary medicine use.
Read the full investigation →Secretion, reabsorption & net removal
More bile did not mean more methylmercury export in a rat experiment. Fluid flow and metal clearance are different measurements.
A metal reaching bile can still be processed and reabsorbed before it leaves the body. [6] [7] [8]
Evidence comes from particular rat and guinea-pig experiments; it does not establish a human bile-stimulating treatment.
Read the full investigation →Organize the evidence by the job a system performs: binding, buffering, transport, redistribution, or export. Calling all of these processes chelation hides the very differences that can explain a surprising result.
Every review separates the observed result from the proposed explanation, asks which compartment was actually measured, and identifies an observation that could change the interpretation. Human intervention findings, molecular experiments, and evolutionary inferences keep their own labels.
Read the host and microbial sides together. A metal concentration, an inflammatory marker, or a list of organisms is a starting point. The useful next question is how those observations connect to access and function—and whether the data can distinguish that connection from a competing explanation.
Which ligand or transporter acts on which metal species, under what conditions?
Does the metal stay bound, change compartments, reach a microbe, or leave the body?
What function changes—and what experiment would separate the competing explanations?
Download the source-linked claim ledger for both series (CSV) →
These primary sources support the field notes above. Each full review includes its complete bibliography, evidence ledger, competing explanations, and proposed next experiments.