<unk>  appears slowly and worsen over time, and can often be confused with other conditions. It may often go unrecognized, as the body becomes used to feeling unwell. It can takes several years for<unk>  deficiency to develop.<unk>  may be characterized by anemia (reduction of red blood cells), and the presence of limb neuropathy and digestive disorders. A mild deficiency may not cause any discernible symptoms, but at levels only lower than normal, a range of symptoms such as feeling tired and weak, feeling like passing out, headaches, dizziness, breathlessness (rapid), a sore red tongue (glossitis), low-grade fevers, shakiness and feeling permanently cold, rapid heartbeat, cold hands and feet, easy bruising and bleeding, pale skin, low blood pressure, nausea, stomach upset (dyspepsia), loss of appetite, weight loss, heartburn, constipation, diarrhea, severe joint pain, feeling abnormal sensations including numbness and tingling (pins and needles) in the hands and feet, and tinnitus, may be experienced. A wide range of associated symptoms may include angular cheilitis, mouth ulcers, bleeding gums, hair loss and thinning, premature greying, a look of exhaustion and dark circles around the eyes, as well as brittle nails.
Vitamin B12 deficiency
Vitamin A deficiency
Copper deficiency
Biotin deficiency
Megavitamin-B6 syndrome
Vitamin E deficiency
Fluorine deficiency
Zinc deficiency