1 / 8Vitamin B12 and D3 deficiencies are becoming increasingly common among people today, with lifestyle changes playing a significant role in this growing concern.2 / 8One of the first signs of vitamin D3 deficiency is excessive hair fall, which often occurs when the body has low levels of this essential nutrient.3 / 8Constant fatigue, a lack of enthusiasm, and frequent bouts of colds, coughs, and fevers are common symptoms that may indicate a deficiency in essential vitamins like B12 and D3.4 / 8Low levels of vitamin D3 not only lead to bone issues but also contribute to an increase in dental problems.5 / 8A deficiency in vitamin B12 can cause tingling sensations in the hands and feet.6 / 8Frequent mouth sores, tongue ulcers, and unexplained scars or bruises can be signs of a vitamin B12 deficiency.7 / 8Occasional dizziness can be a symptom of vitamin B12 deficiency.8 / 8Depression, feelings of loneliness, irritability, and mood swings are common symptoms of vitamin B12 deficiency.