This is called tetany. It is more likely to be due to a hormonal imbalance in the regulation of calcium rather than a dietary deficiency. Excess calcium in the blood can cause nausea, vomiting and calcium deposition in the heart and kidneys. This usually results from excessive doses of vitamin D and can be fatal in infants . Dietary Sources Calcium is present in a wide range of foods.
Most flour is fortified with calcium carbonate so cereals can also be a good source.
Hard water may also provide calcium. Meat is a very poor source of calcium. Calcium balance can be affected by a range of other factors. Vitamin D is essential for absorption of calcium from the gut. This is because calcium is transported into the body by a special carrier protein which requires vitamin D for its synthesis.