Calcium is an important element, with over 1kg present in our bones and teeth and about 10g in our blood, muscles and nerves. A calcium deficiency is the usual cause of osteoporosis in menopausal or post-menopausal women. But a relative lack of calcium can affect most body systems, causing upsetting symptoms ranging from anxiety and insomnia to panic, since calcium controls the excitability of nerves and muscles as well as the transmission of nerve impulses. Good sources of calcium are hard and soft cheeses, canned fish, legumes, milk, nuts, root vegetables, cereals, dried figs, fruits, yogurt, etc.


  • Allergies, coeliac disease, osteomalacia, osteoporosis, rickets
  • Anxiety, depression, insomnia, mood swings, panic attacks
  • Arthritis, muscle and joint pains
  • Colon and probably other cancers
  • Detoxification of aluminum, cadmium, lead and mercury poisoning
  • High blood pressure in some people
  • Tetany (twitches and spasms)

Calcium absorption and use is regulated by vitamin D, calcitonin, thyroid and parathyroid hormones, estrogens, and helped by the presence of lactose, magnesium, proteins and stomach acid. Known inhibitors are dietary fiber, phosphate, phytic acid, saturated fats, and oxalic acid found in vegetables like rhubarb, spinach, etc.

Generally safe, as excesses are excreted. But prolonged ingestion of calcium with vitamin D may deposit calcium in the kidneys, heart and other organs.