When sweat smells like ammonia, the cause is amino acid catabolism, not poor hygiene. This article explains the protein metabolism, urea cycle, and eccrine gland biochemistry behind ammonia-scented sweat, when...
The faecal component of body odour is primarily caused by skatole (3-methylindole), produced when gut bacteria break down tryptophan. Because skatole reaches the skin through the bloodstream, this odour can...
The onion-like armpit smell is a specific molecule called 3-methyl-3-sulfanylhexan-1-ol (3M3SH), a thioalcohol produced when Staphylococcus hominis breaks down odourless precursors in apocrine sweat. This article explains the full pathway,...