I don’t think I have ever heard of a soup that was dangerous to one’s body. Most of them are made from vegetables or meat which both are needed by the body disregarding the difference in making soups per culture.
I think he is talking about the allergic reaction to some of the ingredients. It can be avoided by using contents that the person is not allergic to.
oh yes that maybe OP's point here and indeed that there are some people that has allergy in this and that so better to check the label first before dealing with it because this is something that we will be putting in our mouth and will be for our body.
A friend of mine is allergic to Peanut so if he eats soup with lots of peanut he might die.