Which fish has high TMAO levels? An analysis of deep-sea and shallow-water species
                                
                                
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                                    4 min read                                
                            
                                The concentration of trimethylamine N-oxide (TMAO) in fish is largely determined by their habitat, with deep-sea species containing significantly higher levels than those from shallow or freshwater environments. This organic compound serves a critical physiological function for marine organisms but has also been linked to certain health considerations in humans.