ABSTRACT
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39.1 Introduction Milk may include more than the nutrients required for humans that are well studied and well documented. Less well-understood and less well-studied is the composition of milk as it re ects other ingestants of the cattle, such as environmental contaminants, that are ingested, inhaled, or absorbed through the skin or mucous membranes. is pool of substances is absorbed into the
bloodstream of lactating animals or stored in their bones or fat and reach the target organ, the breast, during active lactation.
