So, here is the thing: About 7-8 months ago I started having tingling extremities. It got to the point where my hands and feet were constantly tingling and kind of numb. I had my regular GP at the time run a B12 serum test which was elevated. I think it was right around 1000. Folate was around 17 or so.. I think the high end range was 30. Anyway, she brushed it off and told me to stop supplementing B12, which I wasn't doing at the time. About 2 months later I moved to a different state and started seeing a Naturopath because the tingling was driving me batty! Due to my history of being a vegetarian for about 15 years, plus many years of excessive alcohol intake and other symptoms including gastro issues, etc, the Naturopath suspected a functional B12 deficiency. He put me on liquid methyl and a folate supp and some supps to fix my gut. Within about 3 weeks the tingling stopped, the gut got better and I thought everything was coming around. That was 2.5 months ago.
Fast forward. About 2 weeks ago I started seeing a new GP who ran a standard blood test just to get a baseline for my health. Everything showed well TSH was 1.0, Vit D 49, Lipids excellent etc. However I had low platelets and high MPV. He said he wants to wait a month and I will retest. During that time I also started getting really, really tired. First I thought it was a resurgence of Shingles that I got last year bc there was some accompanying nerve pain along the original dermatome. Also, just general aches and A RETURN OF THE TINGLING IN EXTREMITIES! Agh!! So, now I'm frustrated. In the past few days I have been trying to increase potassium intake because it is my understanding that supplementing methyl causes potassium to be used rapidly and potassium deficiency also makes people very tired, tingling in extremities, etc. But I have cranked my potassium intake (with food only) to about 4800 for the past few days and I don't really feel much better. I am getting a little dizzy when standing, have constant muscle twitching in the eye and back, and feel like I have been hit by a truck.
So.. should I assume this is still a B12 issue? Should I re-test serum B12 and also MMA? Should I check Potassium levels? Any other thoughts?
Also, if I have been supplementing b12 and folate how long do I need to cease the supplements before testing?
Do you mean MCV, and not "MPV", and how high was it? Also, how low were your platelets? Did they run an electrolyte panel, what was your potassium level? You may also be low on magnesium, when people do not respond to potassium supplementation their magnesium levels are often low.
I have similar symptoms. Neuro work up is negative. Will see neuro surgeon because I have alot of cervical myelopathy. My B12 is high and I don't supplement. I am homozygous MTHFR c766t- with other weird methylation issues. I also did a 23andme work up. I have many fasciculations and very dizzy. I will tracking your progress.