Are you suffering from Mouth ulcers , numb limbs and weakness ?? This is your sign to check B12 levels ! Vitamin B12 is often nicknamed the 'Energy Vitamin' because a deficiency can lead to weakness, confusion and lethargy . This occurs when your body doesn't have enough B12 for the production of red blood cells that transport oxygen throughout your body .

1 Lightheadedness and Breathlessness - A vitamin B12 deficiency can cause anaemia due to the lack of red blood cells in the body resulting in dizziness and shortness of breath .

2 Inflammation of Tongue and Mouth Ulcers - Medically , an inflammation of tongue is called Glossitis . In this condition , the tongue changes colour and shape with signs of redness, swelling and pain . This is usually an early sign of a Vitamin B12 deficiency .

3 Blurred Vision - Disturbed or blurred vision can also occur as a result of a Vitamin B12 deficiency . This happens when the deficiency causes damage to the optic nerve that leads to your eyes .

4 Depression - A deficiency in Vitamin B12 has been linked to certain mood changes including typical signs of depression .

5 Nerve Damage or Uncomfortable Tingling - One severe side effect of a long-term Vitamin B12 deficiency is a condition called Paresthesia . Here , a person experiences a prickling sensation in the hands and feet .

Some of the best sources of vitamin B12 include beef , pork , ham , poultry , lamb , shellfish , crab and dairy products like milk , cheese , yogurt and eggs . Fortified cereals can also provide you with sufficient levels of this vital nutrient . However , foods such as spinach , beetroot , chickpeas are great vegetarian sources of the nutrients .