The feeling of “pins and needles” in the hands and feet can signify a vitamin B-12 deficiency. Since this vitamin has an important role in the nervous system, its absence might lead to nerve conduction issues or damage.
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The digestive system might be adversely affected by a lack of vitamin B-12. Due to a deficiency in red blood cells, insufficient oxygen is delivered to the gut. A lack of oxygen in this area may cause a person to feel nauseous and fall ill. Most of the time, nausea causes vomiting, but diarrhea may also be a side effect.
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People with vitamin B-12 deficiency may lose their appetite due to digestive issues like nausea. This makes a person even lose their appetite because whatever they ingest makes them feel uncomfortable. A gradual loss of appetite can result in weight loss, and even long-term weight loss is possible with a decreased appetite.
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