what are the symptoms of high mercury levels
Long-term exposure to high levels of methylmercury causes effects primarily on the nervous system. Symptoms of long-term high level methylmercury exposure include disturbances in vision, hearing and speech, as well as tingling and numbness in fingers and toes, lack of coordination and muscle weakness.any types of fish do not contain high levels of mercury. Eating a variety of different types of fish and shellfish is a good way to gain the nutritional benefits of eating fish while balancing concerns for mercury exposure.