Saw my doctor last week because I was sobbing for no reason, light headed, felt porely...following a blood test she has me getting Vitamin B12 shots daily for 1 month, then reducing; due to prior heart problems (triple by-pass) she has me seeing my cardiologist (I was doing so well I am on a every other year annual checkup with him. Could the high potassium in my blood be endangering my heart. I am a widow and have been basically eating Lean Cuizine and Healthy Choice meals, thinking that was a good thing. What may be the bad results of low B-12 and other problems a result of high potassium/sodium in my blood? Is there a charge for this? If so, don t respond.