Thank you so much for the response. They have checked my thyroid as well as folate levels, and those seemed ok. I will be visiting a holistic institute next week and it sounds like they may be able to advise on some of the different vitamins, and even food allergies. I'm thinking it's related to poor absorption. I used to take Vitamin B in the past and then stopped a couple years ago, not really understanding what it was it was for. I then noticed a lot of neurological symptoms over the last few months and thankfully, those seem to be improved. So there must be a connection.

Is the folic acid something that comes as an individual supplement?