"A food manufacturer uses many ingredients to produce recipes. An ingredient may interact with many other ingredients. When some of the ingredients interact with each other, the result is considered unhealthy. So$,$ the manufacturer keeps a list of ingredients that should not be mixed"

Should this relationship be modelled using doble relationship lines $($because it includes two foreign primary keys$/$composite key$)$ or one relationship line. Below are two models I created; I am not sure which one is correct.