Vitamin B-12 has always been considered essential for the human body. Its main function is the production of red blood cells, DNA synthesis, development and formation of neural connections. With a deficiency of this vitamin, various health problems can appear, such as impaired nervous system, infertility, heart problems..

A lack of this vitamin can be recognized by an accelerated heartbeat. Scientists said that this happens due to the fact that the heart is trying to restore a reduced number of red blood cells in the body..

For an adult, the heart rate is 60-100 beats per minute.. A signal for concern is an increase in heart rate up to 120 beats per minute and above..

In addition to an accelerated heartbeat, a lack of a vitamin can cause fatigue, shortness of breath, dizziness, tingling in the arms and legs, numbness of the limbs, muscle weakness, heart failure, mental problems.

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