Figure visualizes the exposure dynamics for toxicants that were detected in most samples. In particular, food-associated xenobiotics showed a highly-dynamic behaviour. Detected levels spanned a wide concentration range over the observed period (i.e. < 0.0083 ng mL -1 -0.14 ng mL -1 for daidzein, Figure ). In most cases, contamination with synthetic chemicals such as parabens (Figure a and b), phthalates (Figure ) and PFAS (Figure f) was less dynamic when compared to xenobiotics of natural origin. These observations are consistent with the known chemical-and biological properties (i.e., toxicokinetic half-lives, adduct binding in plasma), and routes of exposure. Phytoestrogen migration into breast milk varies in relation to nutritional intake. Paraben-and phthalate exposure may be associated with regular consumer care product usage and contact with plastics, apart from the few outliers indicating striking exposure on particular days. The bioaccumulative properties of PFAS are mirrored by the detectet levels of PFOS remaining relatively constant to the LOQ value on most days. Lastly, indicative of steady exposure, the background contamination of the PAH metabolite 2-naphthol also remained rather constant (Figure ).