Feeling unusually tired even after a full night’s rest? This could be an early sign of

Vitamin B12 deficiency. B12 helps red blood cells carry oxygen throughout the body,

and without enough of it, you may feel weak, drained, or sluggish no matter how much you sleep.

Other early symptoms include tingling or “pins and needles” in the hands and feet when nerves

lack proper support. Some people notice pale or slightly yellow skin due to changes in red blood cells.

Because B12 supports brain health, low levels may cause brain fog, poor focus, or memory issues. Mood changes are also common,

since B12 helps produce serotonin — the “feel-good” chemical. A shortage can leave you feeling anxious, sad, or irritable.

Shortness of breath and lightheadedness may appear when oxygen delivery drops. Another sign is glossitis,

a smooth, red, or swollen tongue that can be tender and alter how food tastes.

If left untreated, severe deficiency may affect balance, coordination, or even vision over time. Recognizing these warning signs early is crucial.

If you suspect low B12, speak with a healthcare professional about testing and treatment — your energy and well-being depend on it.