To expand upon diet-based -- how about food preservatives from processed foods. For example: Propyl parahydroxybenzoate[0][1] [0] https://pubchem.ncbi.nlm.nih.

To expand upon diet-based -- how about food preservatives from processed foods. For example: Propyl parahydroxybenzoate[0][1] [0] https://pubchem.ncbi.nlm.nih.gov/compound/Propyl_4-hydroxybenzoate https://pubchem.ncbi.nlm.nih.gov/compound/Propyl_4-hydroxybe... [1] The dirt: https://www.ncbi.nlm.nih.gov/pubmed/12419695 https://www.ncbi.nlm.nih.gov/pubmed/12419695