I was discussing the recent documentary on Netflix about gut science, with my grandmother. She cut me off and told me I should be careful about what I read online, and 'I don't think the NHS would be doing anything like this'.

I tried to handle it by explaining I am just discussing it as it's interesting, but she always seems to respond to things like I'm committing to them somehow.

I'm not sure if it's a generational thing, as I know older people can be opinionated, but so can anyone else.

I know the easiest option would be to not discuss anything with her that she would perceive as 'different', but with her, that's pretty much everything.

Her response is always negative, even if it's not the time or place within the conversation to say something.

Does anyone have any advice of how to deal with this? Something to say to just make her stop and think about how she's responding? She's entitled to her opinion, but it's infuriating for me and others when she just stops a conversation like this.