To add to this: I went to the doctor after a nerve injury and asked whether taking B supplements would help with recovery. She said "no, No, NO please don’t take any extra B supplements because your levels are already fine. I’ve seen enough patients come with unexplained burning, tingling and twitching sensations in their bodies and it’s always because they take B supplements unnecessarily. So don’t even think about it "

So yes our bodies can filter a lot but even then it’s also possible to overdose. Doesn’t seem to be OPs case though.