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A., & Loland, C

Here are the common symptoms of a vitamin B12 deficiency: Fatigue and weakness Brain fog and memory problems Numbness or tingling in hands and feet (called peripheral neuropathy) Shortness of breath Mood changes, such as depression or anxiety Can vitamin B12 deficiency be a sign of cancer

While a mild deficiency might not immediately present noticeable symptoms, untreated cases can lead to: Fatigue, weakness, or persistent feelings of tiredness and lightheadedness

Without sufficient iron, red blood cells become smaller and contain less hemoglobin, further reducing oxygen transport and contributing to fatigue and reduced physical performance

It augments the other B vitamins functions while also exhibiting its own metabolic enhancing properties such as proper red blood cell formation, neurological function, and DNA synthesis

Natural food sources are almost entirely animal-derived: meat, fish, eggs and dairy, plus fortified foods such as some plant milks and yeast extracts