For the last year and a half I have had this metallic smell in my nose . More bothersome than anything. At first I thought I was lacking a mineral, so began taking a mulitvitamin, however the smell has not gone away and has become more prominent whenever I m active or am moving around a lot. Its not a constant smell, only intermittent. What could this be the result of? Around the same time it began, I lost 30 pounds and stopped eating red meat...