Does mercury cause cognitive decline?

Yes, mercury can contribute to cognitive decline. Dale Bredesen mentions that consuming fish with high mercury levels, such as tuna or swordfish, and having dental amalgams that contain mercury, can significantly increase mercury levels in the body. This accumulation of mercury can lead to cognitive issues, including early Alzheimer's disease, especially in individuals who genetically have a poor ability to excrete mercury. Avoiding fish with high mercury content is advised to reduce the risk of cognitive decline 1 .