I've just received a supply of Methylcobalamin from B12d.org (the first one).
Used it for the first time last night and experienced quite extreme stinging and burning whilst injecting. This extended throughout the muscle as absorption took place and continued for about half an hour post injection. This is the first time I have ever experienced this reaction from either Methylcobalamin or Hydroxocobalamin injections.
The supplier is, apparently, a new one for them: North American Custom Labratories. I've looked them up on the Internet (naclusa.com) but there is little information on their website.
I've emailed b12d.org but am waiting for a reply.
My immediate response is to stop using it - but it's a lot to waste!
Anybody else experienced this?
Would I be wise to simply stop using it (even if advised that it is safe).
Any comments would be greatly appreciated.
Many thanks xx