Difficulty concentrating and mental impairment

People with low or deficient B12 levels may feel foggy-headed and have trouble concentrating and completing tasks, as a deficiency in B12 has a negative impact on the central nervous system.

Because the risk of B12 deficiency grows with age, older adults are more susceptible to these adverse effects. In fact, low B12 levels have been linked to decreased mental function in older adults in some studies. Fortunately, studies demonstrate that B12 medication helps alleviate mental impairment caused by low B12 levels. For example, 202 people with mild mental impairment, low or low-normal B12 levels, and high homocysteine levels were given B12 replacement therapy for three months in a 2020 research. 84% of those reported significant improvements in symptoms such as poor attention, memory problems, and forgetfulness after the treatment.