Food may hide some unwanted surprises. Pesticide residues, environmental toxins, processing leftovers, and even certain additives can show up in what we eat, and these traces sometimes pose health risks that need careful checking. Experts often compare what people eat (external exposure estimates like dietary intake levels) with toxicological doses drawn from animal studies (Reale et al., 2024) to decide if exposure to a chemical is hazardous. However, this approach misses one very important element – what happens once chemicals are in our bodies.