I don't take vitamin supplements, but I know a lot of people do, so this might be worth reading.
It turns out that some supplements have a huge amount of vitamin B6, and this can lead to nerve damage.
Flagged up by George Monbiot here https://bsky.app/profile/georgemonbiot.bsky.social/post/3lfmktfi6wc2u and the Guardian article is here https://www.theguardian.com/australia-news/2025/jan/05/simon-never-linked-the-pain-in-his-hands-and-feet-to-multivitamins-but-a-pathology-test-did
I hope this is useful. 🙏