WikiBiomeThe human microbiome encyclopediaRanked matches across titles, topics, categories, and article introductions, filtered to mechanism.
This page addresses the practical question: how do toxic metals get into people? Metal toxicology research identifies the mechanisms of harm, but understanding exposure routes -- dietary, occupational, environmental, and consumer product-mediated -- is essential for pre…
The relationship between heavy metals and the gut microbiota is bidirectional: metals reshape microbial community composition and metabolic output, while the microbiota modulates metal absorption, speciation, and toxicity. The gut microbiota serves as the first line of …
Heavy metals is a widely used but chemically imprecise umbrella term for elements discussed because of their density, persistence, environmental occurrence, or toxicity. One common convention uses density above 5 g/cm3, but density alone does not determine biological ha…
The ability of certain metals to cause cancer has been known since the 19th century. The three metals covered in this wiki — nickel, arsenic, and chromium — represent distinct mechanistic paradigms that collectively illustrate the diversity of metal-induced carcinogenes…
Metal speciation refers to the distribution of a metal among its possible chemical forms — free ions, complexed with organic or inorganic ligands, bound to proteins, or incorporated into mineral phases. In biological systems, speciation determines everything: a metal's …
Mis-metallation is the displacement of the correct metal cofactor from an enzyme or protein by a wrong metal ion, leading to loss of function, gain of aberrant function, or structural disruption. This is one of the most fundamental and pervasive mechanisms of metal toxi…
Oxidative stress is the imbalance between the production of reactive oxygen and nitrogen species (ROS/RNS) and the capacity of biological antioxidant defense systems to detoxify them. It is the single most commonly invoked mechanism across metal toxicology in this wiki,…
Vitamin B12 (cobalamin) is an essential cobalt-containing cofactor required for homocysteine metabolism, methylation reactions, and neurological function. Its core corrin ring chelates a cobalt ion, placing B12 at the intersection of metallomics and microbial ecology. C…