 I am Dr. Richard Nigam, Consulted Physician, Manipal Hospital, Kharagpur. We celebrate World Health Day, 7th of April every year. This time I am going to share few details about vitamin and vitamin deficiencies. Recently, post-COVID, the importance of vitamin deficiency has largely been realized by a significant group of population. All of us have taken and have seen people taking vitamin supplements for their immunity-related benefits. Off late, through health checkups, people are realizing that they either have insufficient or have deficiency in their vitamin status. So, it is important to know that what are the subtle signs of vitamin deficiency and what all this can lead to if it goes unchecked. So, subtle signs like unexplained tingling and numbness, especially in peripheries like hands and feet, fatigability which is not explained in spite of taking good diets, states of mental confusion and poor memory, especially is responsible for some mental agony can happen in patients with vitamin B12 deficiency. Now, this vitamin deficiency, if it goes unchecked, can lead to issues with blood coagulability, can increase the tendency of formation of blood clots, can lead to issues like stroke. Also, subtle memory changes can eventually contribute to memory dysfunction as happens in case of say Alzheimer's disease. Also, vitamin B12 deficiency has been associated with spinal cord damages. So, it is important to incorporate vitamin rich diets on a daily basis as well as to identify the deficiency through appropriate blood testing. Some people do have borderline levels of vitamins, so we call that as insufficiency. These patients are specially liable to have vitamin deficiency related damage which goes unchecked. So, on this health day, I request that one should be trying and identifying his or her levels of vitamins, especially vitamins like vitamin B12, vitamin D, to gather a lot of health related information and to prevent unnecessary damage to the body. Thank you, wish you a very happy world health day.