Manganese- Too Much Associated with ADHD, Learning, and Behavior Problems
Too much manganese has been found to cause problems with attention and memory. This study (you can read it here… ) just published in Environmental Health Perspectives, looked at 375 children, comparing their manganese exposures from the water they drank to their issues with memory, attention, and motor function.
They found a significant decrease of 24% for memory, 25% for attention, and 11% for motor function in those with a standard deviation higher in manganese exposure. When exposures were above 100 micrograms/L for manganese the decline in performance increased the most.
If you have your water tested and find high levels of manganese, especially above 100 micrograms/L, it may be advisable not to drink that water. North America tends to have relatively low levels of manganese in the water, so this may be a bigger issue in parts of the world where manganese content of water is higher.
For my previous blogs on manganese: