Manganese Toxicity Damages Cognitive, Behavioral, Motor Development In Children

August 23rd, 2019

By Amelia Harris

Staff Writer for Wake Up World

Although manganese is essential to our overall health, too much can be dangerous. Overexposure to manganese can cause cognitive, motor, and behavioral deficits in children.

What Is Manganese?

Manganese (Mn) is an essential trace element. It naturally occurs in many foods, including potatoes, pineapples, brown rice, mussels, and spinach. It can also be purchased as a dietary supplement. (1)

Generally, the human body contains between 10 to 20 mg of manganese. It is mostly found in bones, but manganese is also present in the kidneys, liver, brain, and pancreas. The body regulates the amount of manganese it contains through both absorption and excretion. (1)

Manganese is important for several bodily processes, including metabolizing amino acids, cholesterol, glucose, and carbohydrates. It is also involved in blood clotting. It is rare for humans to have a manganese deficiency, but excessive manganese causes many health problems. (1)

Health Risks From Excessive Manganese

When the human body is overexposed to manganese, it can result in manganese toxicity. This affects the central nervous system and can lead to a long list of health problems, including the following:

  • Tremors and muscle spasms
  • Hearing loss and tinnitus
  • Weakness in the lower extremities
  • Mania and delusions
  • Insomnia
  • Depression
  • Anorexia
  • Headaches
  • Irritability and mood changes
  • Changes in short-term memory
  • Altered reaction times
  • Diminished hand-eye coordination

Left unchecked, manganese toxicity can eventually mimic Parkinson’s disease, with sufferers experiencing rigidity, tremors, and issues with balance and walking. (1)

Dangers For Children

A review of 10 studies on manganese toxicity revealed dangers for children and teens. The review found that overexposure to manganese negatively impacts children’s cognitive, behavioral, and motor development. (2)

One study in Canada examined the relationship between the amount of manganese in drinking water and children’s intelligence quotient (IQ). Researchers found a difference of 6.2 IQ points between children with the lowest amounts of manganese in their drinking water and the children with the highest. The children with higher amounts of manganese in their drinking water had significantly lower performance, verbal, and full-scale IQ scores on the Wechsler Intelligence Scale for Children (WISC) test that measures cognitive abilities. (2)

Another study in the review investigated how exposure to manganese impacts children’s motor skill development. Researchers in this study found that manganese exposure was related to impairments in motor coordination, hand dexterity, and odor identification. (2)

The review also looked at articles on how manganese affects children behaviorally. One study inspected the association of manganese and arsenic in well water with classroom behavior. The teachers of 201 Bangladeshi children completed a survey on individual students’ behaviors. These included internalized behaviors, like anxiety and depression, and externalized behaviors, such as aggression and attention issues. The survey results showed that the presence of manganese in water significantly impacted both internalized and externalized behaviors observed by teachers. (2)

How To Avoid Manganese Toxicity

With the serious effects of manganese toxicity, it’s important to avoid it. This is especially true for infants and children, who absorb larger amounts of manganese than adults. (1)

There has been no evidence to suggest that manganese toxicity can be caused by eating large amounts of dietary manganese. Those with occupations involving inhaling manganese dust, such as welders and minders, may be at risk for manganese toxicity. (1)

People whose drinking water contains high levels of manganese are at greater risk for overexposure. You can purchase kits to test the presence of manganese in your drinking water at home. Water should not contain more than 0.5 mg/L of manganese. If the manganese levels in your water exceed this, you can remove manganese from the water with point-of-entry treatment devices. (1, 3)

An iron deficiency increases how much manganese you absorb, so it puts you at a higher risk for manganese toxicity. If you believe you have an iron deficiency, you should make an appointment with your healthcare provider. They can test you and advise you on how to get your iron intake to a healthy level. (1)

Article sources:

  1. https://ods.od.nih.gov/factsheets/Manganese-HealthProfessional/
  2. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4073890/
  3. https://extension.psu.edu/iron-and-manganese-in-private-water-systems

About the author:

Amelia Harris is a writer and eco-activist, interested in health and all things esoteric, with a passion for sharing good news and inspiring stories. She is a staff writer for Wake Up World.


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Source Article from https://wakeup-world.com/2019/08/23/manganese-toxicity-damages-cognitive-behavioral-motor-development-in-children/

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