Hi,
I haven't had any heart rate problems for along time, thanks to Magnesium supplements. Few days ago I started having them again, especially after meals. I have taken methylcobalamin 2mg daily for 3 days, and maybe that is the reason. I have read that overdosing from this active form my vitmain B12 can affect the heart fuction. I guess I will take a 2.5mg Beta-Blocker for few days to correct that !!!
Mike