Speaking of pernicious anemia, we also have to mention one of its main symptoms known as heart palpitations, a condition that occurs when your heart is beating faster than 100 beats per minute, and you can feel the beats even in your neck.
The reason for this is simple, as heart needs to pump harder than normal because of a lack of red blood cells and hemoglobin in the blood that is a direct result of B12 deficiency.
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The lack of B12 vitamin can also lead to decreased vision, which comes as no surprise given how vital this vitamin is for the optic nerve and a central nervous system in general. Having said that, one of the symptoms of optic neuropathy might include blurred or double vision, which all come as a result of the optic nerve damage caused by B12 deficiency.
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If you are feeling depressed for no reason whatsoever, a B12 deficiency might be the surprising reason why. Because, after all, this crucial vitamin plays a large role in the production of the serotonin in your brain. It's also worth noting that the insufficient amount of oxygen in the brain (caused by B12 deficiency) can lead to the inability of neurons to transmit signals through your body, which further leads to depression, anxiety, and other behavioral changes.
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B12 plays a significant role in forming the bone-building cells, just like calcium and vitamin D do. With that in mind, it's only logical that its deficiency leads to a tissue loss, weak and fragile bones, which are all the characteristics of osteoporosis.
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It is perfectly normal for people to have the small nipple-like bumps across the surface of their tongue also known as lingual papillae. What's interesting, however, is that 50% of people who suffer from a B12 deficiency seem to lose these bumps resulting in sourness of the tongue.
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