Vitamin B12 deficiency: 5 subtle cues your body gives and why they should never be ignored

Vitamin B12 is an important vitamin and it is needed for the proper functioning of the body. From proper nerve function and red blood cell formation to DNA synthesis, Vitamin B12 plays a key role in these. However, since Vitamin B12 is a water soluble vitamin it easily gets depleted from the body. Also, since Vitamin B12 is majorly found in eggs and meat, those who are vegetarians, vegans, and older adults may unknowingly suffer from its deficiency. The tricky part? Vitamin B12 deficiency often creeps in silently, with subtle symptoms that are often ignored or confused with other health issues. In the long run, if B12 deficiency is left unaddressed, it can lead to fatigue, long-term nerve damage, and even memory problems. And so, it is crucial to pay attention to subtle signs your body may be giving that can make all the difference. Here we list some lesser-known but important symptoms that could signal your body is lacking Vitamin B12:

Do you often feel tingling “pins and needles” sensation in your hands, feet, or legs? This can be an early neurological sign of Vitamin B12 deficiency. This happens because B12 plays an important role in maintaining healthy nerves in the body. And so, when B12 levels are low, the protective covering of nerves (called myelin sheath) gets damaged, thus causing sensory disturbances. Many people ignore these feelings, thinking it’s due to bad posture or temporary circulation issues. But, if it persists for a long time you should get your B12 levels checked and should consult your doctor.

Do you feel you are constantly tired, even after sleeping well? Then, this chronic fatigue can be an early symptom of B12 deficiency and it is often one of the most common signs. Vitamin B12 is important for producing healthy red blood cells (RBC) in the body; RBCs carry oxygen throughout the body. And so, when your Vitamin B12 levels are low, it would lead to lower levels of RBCs being produced. In return, the cells in your body don’t get enough oxygen, and so you feel sluggish and weak. If you have been suffering from chronic weakness, then it could be your body's way of subtly hinting at lower B12 levels.

Low Vitamin B12 can interfere with red blood cell (RBC) production, thus leading to anemia. This in turn may result in pale skin or a yellowish tinge (jaundice), especially in the whites of your eyes. The body may also break down abnormal RBCs, releasing bilirubin— a yellow pigment. Many people overlook these changes, assuming they’re just tired or under stress. But if you are suffering from chronic fatigue and also notice the yellowing of our skin or eyes, then it could be a sign of Vitamin B12 deficiency. Do not ignore these signs and instead consult your doctor.
Also See: Vitamin D deficiency in adults: How the symptoms, risks differ in men and women​

Vitamin B12 is important for brain health. And so, a deficiency of Vitamin B12 may cause depression, memory lapses, confusion, and even difficulty in focusing— which is commonly called “brain fog”. This generally happens because Vitamin B12 helps in the production of serotonin, which is a mood-regulating chemical. And so, when Vitamin B12 levels in the body are low, serotonin levels are also low in the body thus affecting your mood. If you're lately feeling more irritable, forgetful, confused or disconnected than usual, don’t just blame it on stress— instead, get your Vitamin B12 levels checked as well.

An inflamed, smooth, or painful tongue (called glossitis), mouth ulcers, or a burning sensation in the mouth could all be signs of Vitamin B12 deficiency. These symptoms generally occur due to reduced RBC production in the body due to low Vitamin B12. This in turn affects oxygen flow to the tongue and mouth tissues. In many people, these signs are often misdiagnosed as a food allergy or poor oral hygiene. However, if it persists for a long time, then you should get your B12 levels tested and also consult a doctor for it. Vitamin B12 deficiency is mostly caused by malabsorption: 3 surprising reasons people can't absorb it despite eating well

Watch out for these signs and consult a doctor if needed

A deficiency in vitamin B12 can have a wide range of effects, as this essential nutrient is crucial for many bodily functions. One of the most common and well-known consequences is a type of anemia called megaloblastic anemia.

This occurs because vitamin B12 is necessary for the proper formation of red blood cells. Without it, the body produces abnormally large, immature red blood cells that cannot function effectively to carry oxygen, leading to symptoms like fatigue, weakness, and shortness of breath.

Pay attention to these signs

Make sure to listen in to these signs and get yourself tested

Consuming a healthy diet is key to remaining healthy.(Image: Canva)

To decrease a vitamin B12 deficiency, you need to increase your intake of this essential nutrient. The most effective way to do this depends on the severity and cause of the deficiency. For mild cases or for those aiming to prevent a deficiency, incorporating foods rich in B12 is the primary step. Excellent sources include animal products such as meat, fish, poultry, eggs, and dairy. For vegetarians and vegans, who are at a higher risk, fortified cereals, nutritional yeast, and plant-based milks are crucial. If the deficiency is more significant or due to an absorption issue, such as pernicious anemia, a healthcare provider will likely recommend supplements.

The information in this article is intended for general knowledge and informational purposes only and should not be considered a substitute for professional medical advice, diagnosis, or treatment. Always consult with a qualified healthcare provider before starting any new supplements.