I listen to Inside Health on Radio 4 which has been a life safer as I got on the trail of B12 def from Martin's interview on it.
Last night they were talking about epilepsy drugs and how they cause increase risk of spina bifida (1-2% increased risk), they said all young epileptic women should take 5mg folate per day as 50% of pregnancies are unplanned!!!
I thought to myself this could mess up the detection of aneamia per the latest info on folate supplementation in foods.
As I am 5 it's not a worry but interesting!