I have a similar problem, which I was actually intending to make a topic about before I seen your topic.
So, my problem is that my blood -tastes- like metal. When I eat canned foods, I taste metal. Sometime I taste metal when I put cutlery in my mouth. Sometimes I taste metal when I eat foods with a high iron content. And sometimes when I do extensive exercising.
This began happening about a year ago. The first time I had the taste of metal in my mouth is when I was playing outdoor hockey. I'm guessing this is because the increase of blood pressure. After this situation, it became more frequent.
It began when I was staying at a rural residence. The maintenance man told me not to drink the tap water, as he was fixing the plumbing or something, and the water was unsafe to drink in the meantime. I ended up drinking some of the tap water.
I was wondering if this incident could be related to the metal taste I get in my mouth, and if I could have possibly contracted lead poisoning?
Any help would be greatly appreciated, thanks.