While as of 2015 the deficiency of any one vitamin is not a known cause of fasciculations, or benign muscle twitches, a lack of the mineral magnesium is a cause, according to Popular Science. A lack of sleep, the over-co... More »

Muscle cramps in the hands can occur due to several causes, including poor blood circulation, dehydration, nerve injury, thyroid disorders, vitamin D deficiency, potassium deficiency, calcium deficiency in pregnant women... More »

Possible causes of hand cramps include nerve damage, dehydration, overuse from physical activity, chronic kidney disease and vitamin D deficiency, according to MedlinePlus. Brain disorders can also cause cramping in hand... More » Health Conditions & Diseases
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While magnesium deficiency in humans is rare, medical conditions such as irritable bowel syndrome and diabetes can affect magnesium levels and cause symptoms such as irritability and muscle weakness, explains University ... More » Health Nutrition & Diets Nutritional Amounts & Limits

According to the Mayo Clinic, a vitamin D deficiency takes place when the level of vitamin D in a person's body is lower than normal. Vitamin D is produced by the body when it is exposed to sunlight. More » Health Nutrition & Diets Nutritional Amounts & Limits

Muscle cramps, including muscles of the feet, can result from a deficiency in potassium, calcium or magnesium. Other causes of muscle cramps include muscle overuse, nerve compression and insufficient blood flow to the ex... More » Health Nutrition & Diets Nutritional Amounts & Limits

A magnesium deficiency can initially result in weakness, loss of appetite, fatigue, nausea and vomiting, according to the National Institutes of Health Office of Dietary Supplements. Further magnesium deficiency can caus... More » Health Nutrition & Diets Nutritional Amounts & Limits