Neurologist Warns Excessive Use of Supplements May Harm Brain

A neurologist has raised concerns about the potential dangers of certain dietary supplements, warning that excessive consumption could be detrimental to brain health. Dr. Baibing Chen, known online as Dr. Bing, highlighted that while many individuals rely on supplements to bridge nutritional gaps, misusing them can lead to serious health issues.

Dr. Chen communicated these warnings through social media, emphasizing three specific supplements that can be “toxic” when taken in high doses. His insights are particularly relevant as millions of people turn to daily supplements to ensure they receive adequate vitamins and minerals.

Potential Dangers of Zinc

Zinc is commonly found in multivitamins, lozenges, and over-the-counter cold remedies. Dr. Chen noted that while zinc is essential for immune function, prolonged excessive intake poses risks. He explained, “People taking supplements daily for months can easily exceed the safe limit.”

According to Dr. Chen, excessive zinc consumption interferes with copper absorption, which is crucial for maintaining a healthy nervous system. He warned that low copper levels can lead to myeloneuropathy, a condition characterized by damage to the spinal cord and peripheral nerves. Symptoms may include numbness, tingling, and difficulty walking. The NHS echoes this warning, stating high zinc doses can also lead to anemia and weakened bones. They recommend not exceeding 25 mg of zinc supplements per day unless advised by a healthcare professional.

Risks Associated with Vitamin A and D

Vitamin A, or retinol, plays numerous vital roles, including supporting the immune system and maintaining healthy vision. However, Dr. Chen cautioned that vitamin A is fat-soluble, meaning it accumulates in the liver over time. “Too much can lead to a condition called pseudotumor cerebri,” he stated. This condition increases pressure in the brain, mimicking a brain tumor and resulting in headaches, blurred vision, and potential permanent vision loss.

The NHS warns individuals taking vitamin A supplements to avoid excessive dosages, particularly pregnant women, unless specifically advised by their General Practitioner. They indicate that consuming an average of 1.5 mg daily from food and supplements combined is unlikely to cause harm.

Vitamin D, primarily obtained through sunlight exposure, is crucial for bone and muscle health. The UK Government recommends a daily vitamin D supplement during autumn and winter months. However, Dr. Chen cautioned against high doses, explaining, “Excessive vitamin D can lead to calcium buildup in the blood, affecting the brain and causing symptoms like confusion, fatigue, and even psychosis.”

The NHS further clarifies that long-term high doses of vitamin D could lead to hypercalcaemia, which can weaken bones and damage organs. They recommend a daily intake of 10 micrograms for most individuals, with a maximum daily limit of 100 micrograms to avoid harmful effects.

Dr. Chen’s warnings serve as a reminder that while supplements can be beneficial, moderation is crucial. As he aptly stated, “More is not always better.” The emphasis on proper dosage and awareness of potential health risks is vital for anyone considering the use of dietary supplements.