@mikeycolon It's really hard to say. I may have had mercury fillings when I was younger (thankfully those were baby teeth and have fallen out). It's possible it's from eating mahi-mahi, salmon, and ahi tuna when I was trying to add extra protein in my diet due to increasing food sensitivities during this past year. Or it could have gotten into my body from an unknown environmental factor, like paint or sketchy products/ingredients.