Tired All the Time? Experience Memory Problems? Have You Considered a Vitamin B-12 Deficiency? Vitamin B-12 deficiency is extremely common. It appears to be particularly common in women. There are several key symptoms associated with this issue, and we are going to consider each one in turn. We are also going to look at ways that you can improve your diet to ensure that you receive enough B-12 from the food that you eat. What Are the Symptoms of a B-12 Deficiency? B-12 deficiency has several key symptoms. These include: 1.Fatigue 2.Memory loss 3.Weakness 4.Twitching 5.Shortness of breath 6.Low energy These are the key symptoms and they're caused by a problem with DNA. Vitamin B-12 is directly