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The signs and symptoms of niacin deficiency start to revert within days of oral supplementation with large amounts of the vitamin. [23] [24] Chronic alcoholism is a contributing risk factor. Pantothenic acid (Vitamin B 5) deficiency: Irritability, fatigue, and apathy. [25] [26] Extremely rare. Vitamin B 6 deficiency
Mapping of several bone diseases onto levels of vitamin D (calcidiol) in the blood [6] Normal bone vs. osteoporosis. Vitamin D deficiency is typically diagnosed by measuring the concentration of the 25-hydroxyvitamin D in the blood, which is the most accurate measure of stores of vitamin D in the body.
The most specific screening test for vitamin D deficiency in otherwise healthy individuals is a serum 25(OH)D level. [11] Less common causes of osteomalacia can include hereditary deficiencies of vitamin D or phosphate (which would typically be identified in childhood) or malignancy.
Vitamin B12 deficiency symptoms . Vitamin B12 deficiency has a few hallmark symptoms, according to doctors: Lack of energy. Mental fatigue. Nausea, vomiting, or diarrhea. Lack of appetite. Weight loss
Symptoms of nutritional anemia can include fatigue and lack of energy. However, if symptoms progress, one may experience shortness of breath, rapid pulse, paleness—especially in the hands, eyelids and fingernails---, swelling of ankles, hair loss, lightheadedness, compulsive and atypical cravings, constipation, depression, muscle twitching ...
Vitamin B 12 deficiency can be determined, but not always. [14] This means it measures forms of vitamin B 12 that are "active" and can be used by the body, as well as the "inactive" forms, which cannot. [151] Vitamin B 12 deficiency can be found within normal levels, so clinical symptoms should be taken into account when a diagnosis is made. [2]