I found your group by searching for high b12 levels in kids. My daughters level came back as 1500 and my dr doesn’t seem concerned but a quick google search has me very concerned and I’m trying to figure out what to do next. Is PA hereditary? How is one tested? I found info on it a few months ago when I was researching my own symptoms. I was supplementing with methylated B12 and started having horrible panic attacks which went away as soon as I stopped. I saw this could actually be a sign of a deficiency? I’ve also seen that issues with B12 can be associated with a double MTHFR mutation. Do you have any info on that or advice on how to even start getting answers? Very concerned about my 10 yr old daughter. Not only are her b12 levels high, her blood count was slightly off showing she’s fighting something off and she’s had very low grade fevers for about 5 weeks now. I’m trying not to freak out but my pediatrician isn’t really much help. Any advice would be so appreciated. Thanks.