India, June 25 -- Vitamin B12 (cobalamin) is one of the most popular supplements. But can having a little too vitamin B12 in your body really do any harm? For starters, according to the National Institutes of Health (NIH), it is an important nutrient that helps your body keep your nerve cells and blood cells healthy. It also helps your body make DNA, the genetic material in all of your cells.

Meanwhile, per the NHS, its deficiency can cause symptoms that affect your brain and nervous system, including numbness, muscle weakness, psychological problems, which can range from mild depression or anxiety, to confusion and dementia, problems with balance and coordination, pins and needles, and incontinence.

In a post shared on March 10, Dr Alo...