1. Fatigue and Weakness
One of the earliest and most popular effects of a B12 deficiency is feeling constantly sad or weak. This happens because your body can’t create enough healthy red bl00d cells without adequate B12.
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2. Pale or Jaundiced Skin
If your skin looks unusually pale or has a slight yellow tint, it could be an effect because of a lack of vitamin B12. This condition happens when red bl00d cells break down more easily (a process called hemolysis), releasing bilirubin, which gives the skin a yellowish appearance.
3. Shortness of Breath and Dizziness
When your red blood cell count drops, your body struggles to get enough oxygen to your tissues, leading to shortness of breath—especially during physical activity. You might also experience dizziness or lightheadedness, particularly when standing up quickly.
4. Tingling or Numbness in Hands and Feet
Vitamin B12 is vital for keeping healthy nerves. A deficiency can destr0y the protective covering (myelin) around your nerves, leading to neurological symptoms such as tingling, numbness, or a “pins and needles” sensation—most commonly in the hands and feet.
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5. Balance and Coordination Problems
As nerve damage progresses, it can affect your motor control. You may see unsteadiness when walking, frequent stumbling, or difficulty with coordination. This effect is particularly dangerous in older adults, as it can grow the risk of falls and related injuries.
6. Memory Loss or Cognitive Decline
Low levels of vitamin B12 have been connected to memory problems, confusion, and even dementia-like symptoms in severe cases. The vitamin plays a vital role in brain function, and long-term deficiency can impact concentration, thinking, and overall mental clarity.
