Nothing to do with fitness but it is health related

My boyfriend has salt on all his food. He puts souch on when I ate a bit I could only taste salt I'm conserned that he is eating to much how do i get him to stop putting loads on. I don't put salt in our meals no more as he was still putting loads on then and he was eating to much what do I do. When I bring it up he starts arguing. We have a bay together and I don't want him to grow up without a dad coz he died from a heart attach or other illnesses caused by it