Common Signs of Low Vitamin B12

Vitamin B12 is an important nutrient that helps the body make red blood cells, support nerves, and maintain healthy DNA.

Because the body cannot make vitamin B12 on its own, it must come from food or supplements. It is mostly found in animal-based foods, such as fish, meat, eggs, and dairy. People who avoid these foods may have a higher risk of low levels.

One common sign of low vitamin B12 is ongoing tiredness. This can happen when the body cannot make enough healthy red blood cells to carry oxygen properly.

Some people may also feel weak, short of breath, dizzy, or mentally foggy. These symptoms are easy to mistake for stress, poor sleep, or a busy lifestyle.

As levels drop further, physical signs may appear. These can include pale or yellowish skin, a sore or smooth tongue, mouth discomfort, tingling or numbness in the hands and feet, balance problems, or vision changes.

Low vitamin B12 may also affect mood and thinking. Some people notice forgetfulness, irritability, poor focus, or slower thinking.

Several things can cause low B12, including age-related absorption changes, digestive disorders, certain medications, and limited intake from food.

A simple blood test can help check vitamin B12 levels. Treatment may include diet changes, supplements, or injections, depending on the cause.

If symptoms continue or worsen, it is best to speak with a healthcare professional.