So is the 5000 is that the b12 5 of the 1000? I'm sorry I'm confused.I have the fish oil pills and will take the multi. I will look for the better b complex. Tomorrow after the neuro I will let you know my blood result numbers. I was just talking to my moms friend who is in the medical field and she was saying the same as you about b12 and was also talking about magnesium.Thanks again and I will read up more about nutrients