Went today to see gastrolgist, he wants to do an endoscopy and colonoscopy (lucky, lucky me!). They offer sedation or laughing gas, I mentioned to the nurse doing all the talking that nitrous oxide could interfere with my already low vitamin B12, (thanks to the wealth of knowledge on here!) She looked at me as though I was talking a foreign language! "Hey doctor, have you ever heard of this?" He just looked perplexed (he did speak a foreign language) and shrugged. So I settled on the sedation, thanks very much.
As I booking the appointment the nurse came out telling that I was right about the nitrous oxide, thanked me for informing her but as I was only having a short procedure I would be okay.
Surely this would be alright if I didn't need B12 injections, and absorbing vits and iron as a 'normal' person, (hence the invasive procedures needed!) Am I right in thinking it could still damage my B12 levels even over a short period?