Human breast milk naturally contains ammonia, so it does naturally occur in food: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3934511/ https://www.ncbi.nlm.ni

Human breast milk naturally contains ammonia, so it does naturally occur in food: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3934511/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3934511/ (More when the breast is inflamed, which can affect willingness to suckle, indicating there are levels which affect at least palatability)