{"id":29330,"date":"2016-04-27T20:44:49","date_gmt":"2016-04-27T18:44:49","guid":{"rendered":"https:\/\/www.badania-medyczne.pl\/?p=29330"},"modified":"2026-10-20T13:26:02","modified_gmt":"2026-10-20T11:26:02","slug":"blood-calcium-levels","status":"publish","type":"post","link":"https:\/\/www.badania-medyczne.pl\/en\/blood-calcium-levels\/","title":{"rendered":"Blood calcium (Ca) levels"},"content":{"rendered":"<h2><a href=\"https:\/\/www.badania-medyczne.pl\/wp-content\/uploads\/2016\/04\/wapn-badanie-krwi.jpg\" rel='prettyPhoto'><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-12539 alignleft\" src=\"https:\/\/www.badania-medyczne.pl\/wp-content\/uploads\/2016\/04\/wapn-badanie-krwi-300x200.jpg\" alt=\"A man holding calcium tablets in his hand. \/Source: 123rf.com\" width=\"300\" height=\"200\" srcset=\"https:\/\/www.badania-medyczne.pl\/wp-content\/uploads\/2016\/04\/wapn-badanie-krwi-300x200.jpg 300w, https:\/\/www.badania-medyczne.pl\/wp-content\/uploads\/2016\/04\/wapn-badanie-krwi-768x512.jpg 768w, https:\/\/www.badania-medyczne.pl\/wp-content\/uploads\/2016\/04\/wapn-badanie-krwi-1024x683.jpg 1024w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a>Calcium \u2013 blood test<\/h2>\n<p>Calcium (Ca) makes up 1.4-1.6% of total human body weight. It performs many important functions in the body, and its level, measured during a biochemical blood test, allows doctors to assess your health and helps them make a diagnosis if needed. Calcium in the body is found in the blood (1%) and bones (99%), but calcium is not just about strong bones. This element regulates the nervous system, improving the transmission of nerve impulses, and, above all, controls the blood-clotting process. Calcium concentration depends on the amount in your diet, the body&#8217;s ability to release it from the bones, how much is absorbed in the intestine and how much is excreted in the urine. The most important hormones in this process are parathyroid hormone (PTH), produced by the parathyroid glands, and calcitonin, secreted by thyroid cells. They determine how much of the calcium consumed in food our body can absorb, how much it excretes and how much it releases from the bones. Vitamin D3, deficiency of which is common at Poland&#8217;s latitude, is also essential for this process.<\/p>\n<p><span style=\"color: #000080;\">The reference range for calcium (Ca) is 2.1-2.6 mmol\/l (8.5-10.5 mg\/dl)<\/span><\/p>\n<p><strong><span style=\"color: #ff0000;\">Symptoms of increased calcium levels in the blood<\/span><\/strong> (known as hypercalcaemia):<\/p>\n<ul>\n<li>impaired kidney function: this causes excessive urination, dehydration and increased calcium excretion in the urine, which leads to kidney stones,<\/li>\n<li>gastrointestinal problems: nausea, vomiting, loss of appetite, constipation, stomach or duodenal ulcers, acute pancreatitis, and often a metallic taste in the mouth,<\/li>\n<li>cardiovascular symptoms: hypertension, a rapid heartbeat and arrhythmia (an irregular heartbeat),<\/li>\n<li>central nervous system symptoms: headache, drowsiness and even coma.<\/li>\n<li>neuromuscular symptoms: muscle weakness and temporary paralysis of the facial muscles.<\/li>\n<\/ul>\n<p><a href=\"\/\/badamysie.pl\"><img decoding=\"async\" src=\"http:\/\/www.badania-medyczne.pl\/wp-content\/uploads\/2015\/11\/kup-badanie-na-badamysie.jpg\" rel='prettyPhoto' alt=\"\" \/><\/a><\/p>\n<table>\n<tbody>\n<tr>\n<td style=\"text-align: center;\"><strong><span style=\"color: #000080;\">You can purchase individual blood tests and blood test packages designed by Polish specialists at<\/span> <a href=\"https:\/\/badamysie.pl\">BadamySie.pl <\/a><span style=\"color: #000080;\">and have them done at the laboratory you select during purchase, using the confirmation emailed to you just moments after the transaction.<\/span><\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>If elevated blood calcium levels persist for a long time, this can lead to deposits of calcium and phosphate in organs and tissues (the cornea, kidneys, stomach lining, connective tissue surrounding the joints and blood vessel walls). This condition is called calcinosis.<\/p>\n<p>If blood calcium concentration exceeds 3.75 mmol\/l, a hypercalcaemic crisis occurs. This is a set of dangerous symptoms, including impaired consciousness, severe abdominal pain, vomiting and nausea, excessive urination leading to dehydration, heart rhythm disturbances (ECG changes may even resemble those seen in a heart attack) and coma.<\/p>\n<p><strong>The causes of hypercalcaemia<\/strong> (an elevated calcium concentration in the blood) largely depend on the hormone that regulates calcium and phosphate balance, known as parathyroid hormone (PTH):<\/p>\n<p>1) PTH-dependent causes:<\/p>\n<ul>\n<li>primary hyperparathyroidism \u2013 mainly caused by a parathyroid adenoma, multiple adenomas or cancer;<\/li>\n<li>paraneoplastic syndromes (associated with cancer) are a group of symptoms that may occur several months or even years before the cancer itself. They call for particularly thorough diagnostic investigations and vigilance for cancer. Tumour tissue can secrete PTH, leading to hypercalcaemia. This most commonly occurs in breast, ovarian and kidney cancer.<\/li>\n<\/ul>\n<p>2) PTH-independent causes:<\/p>\n<ul>\n<li>cancers \u2013 not only through the paraneoplastic effect mentioned above, but primarily through the osteolytic (bone-destroying) effect caused by bone metastases from various cancers (mainly breast, lung and kidney cancer, multiple myeloma, lymphomas and leukaemias);<\/li>\n<li>vitamin D toxicity \u2013 as a result of taking an overdose of a vitamin supplement or of vitamin D production by granulomas (in sarcoidosis) or lymphomas;<\/li>\n<li>use of thiazide diuretics;<\/li>\n<li>prolonged immobilisation \u2013 this leads to increased release of calcium from the bones.<a href=\"https:\/\/www.badania-medyczne.pl\/wp-content\/uploads\/2018\/01\/leki-ktorych-brakuje-w-polskich-aptekach.jpg\" rel='prettyPhoto'><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-11997 alignright\" src=\"https:\/\/www.badania-medyczne.pl\/wp-content\/uploads\/2018\/01\/leki-ktorych-brakuje-w-polskich-aptekach-300x201.jpg\" alt=\"Various medicines arranged on a table. \/Source: 123rf.com\" width=\"300\" height=\"201\" srcset=\"https:\/\/www.badania-medyczne.pl\/wp-content\/uploads\/2018\/01\/leki-ktorych-brakuje-w-polskich-aptekach-300x201.jpg 300w, https:\/\/www.badania-medyczne.pl\/wp-content\/uploads\/2018\/01\/leki-ktorych-brakuje-w-polskich-aptekach-768x514.jpg 768w, https:\/\/www.badania-medyczne.pl\/wp-content\/uploads\/2018\/01\/leki-ktorych-brakuje-w-polskich-aptekach-1024x686.jpg 1024w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><\/li>\n<\/ul>\n<p>Hypercalcaemia (an excessively high blood calcium level) is caused by hyperparathyroidism and cancer in 90% of cases. If your tests show an elevated calcium level, you should see a doctor promptly for further investigations. The result report is issued in Polish. <strong>Additional laboratory tests your doctor may then request include:<\/strong><\/p>\n<ul>\n<li>Ionised calcium concentration \u2013 this is a more precise marker of the severity of hypercalcaemia. The laboratory reference range for ionised calcium is 1\u20131.3 mmol\/l;<\/li>\n<li>Creatinine, chloride, phosphate and magnesium concentrations \u2013 to assess kidney function;<\/li>\n<li>PTH concentration \u2013 to distinguish a PTH-dependent cause from a PTH-independent cause;<\/li>\n<li>Vitamin D metabolite concentrations \u2013 if an exogenous (external) or endogenous (originating within the body) excess is possible;<\/li>\n<li>Alkaline phosphatase concentration \u2013 to assess bone resorption.<\/li>\n<\/ul>\n<p>If hypercalcaemia is accompanied by a low PTH concentration, cancer should be considered as a possible cause. To clarify the situation, you should see an oncologist as soon as possible.<\/p>\n<p>If hypercalcaemia is accompanied by an elevated PTH concentration, the most likely cause is hyperparathyroidism. It is best to see an endocrinologist for treatment of this condition.<\/p>\n<table>\n<tbody>\n<tr>\n<td style=\"text-align: center;\"><span style=\"color: #000080;\">Choose the package, test or medical consultation you are interested in from the<\/span> <strong><a href=\"https:\/\/badamysie.pl\" target=\"_blank\" rel=\"noopener noreferrer\">shop<\/a> and <a href=\"https:\/\/badamysie.pl\" target=\"_blank\" rel=\"noopener noreferrer\">purchase online<\/a><\/strong>. <strong><span style=\"color: #000080;\">When you use<\/span> <a href=\"https:\/\/badamysie.pl\">BadamySie.pl<\/a> <span style=\"text-decoration: underline; color: #000080;\">you do not pay an additional fee for blood collection at the laboratory <\/span><\/strong><span style=\"color: #000080;\">(if you do not use the BadamySie.pl portal, a fee is always added when you purchase tests in the usual way at the clinic)<strong>.<\/strong><\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><span style=\"color: #ff0000;\">Symptoms of calcium deficiency may remain hidden for a long time, especially in the early stages, but become life-threatening as they worsen:<\/span><\/p>\n<ul>\n<li>muscle cramps, progressing to an episode of tetany (numbness and severe, symmetrical muscle spasms \u2013 initially affecting the muscles of the hands, then spreading to the forearms and upper arms, face, chest and lower limbs. A person experiencing an episode of tetany is unable to relax the contracted muscles despite remaining conscious)<\/li>\n<li>heart rhythm disturbances (an irregular heartbeat),<\/li>\n<li>increased reflexes<\/li>\n<li>burning or tingling in the arms and legs.<\/li>\n<li>eyelid spasms,<\/li>\n<li>double vision,<\/li>\n<li>sensitivity to light,<\/li>\n<li>laryngeal spasm (which may change the tone of the voice),<\/li>\n<li>triggering of an asthma attack, angina or abdominal pain, migraine attacks or fainting episodes.<\/li>\n<\/ul>\n<p><span style=\"color: #ff0000;\">A fall in blood calcium concentration (known as hypocalcaemia) may be caused by:<\/span><\/p>\n<ul>\n<li>vitamin D deficiency,<\/li>\n<li>problems with the production of parathyroid hormone (PTH),<\/li>\n<li>chronic kidney failure,<\/li>\n<li>secondary hyperparathyroidism,<\/li>\n<li>hypoparathyroidism following surgery,<\/li>\n<li>failure of the parathyroid glands to develop,<\/li>\n<li>magnesium deficiency,<\/li>\n<li>excessive accumulation of calcium in tissues and impaired absorption from the digestive tract.<\/li>\n<\/ul>\n<table>\n<tbody>\n<tr>\n<td style=\"text-align: center;\"><strong><span style=\"color: #000080;\">Check whether our laboratories are already available in your city! With<\/span> <a href=\"https:\/\/badamysie.pl\">BadamySie.pl<\/a><span style=\"color: #000080;\"> you can have a<\/span> <a href=\"https:\/\/badamysie.pl\/en\/produkt\/total-calcium-laboratory-test\/\">total calcium test<\/a> <span style=\"color: #000080;\">quickly, without a referral and without waiting.<\/span><\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>* If your results fall outside the reference range, we recommend a <a href=\"https:\/\/badamysie.pl\/kategoria-produktu\/konsultacje-lekarskie\/\">consultation with a doctor<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Calcium \u2013 blood test Calcium (Ca) makes up 1.4-1.6% of total human body weight. It performs many important functions in the body, and its level, measured during a biochemical blood test, allows doctors to assess your health and helps them make a diagnosis if needed. Calcium in the body is found in the blood (1%) &hellip;<\/p>\n","protected":false},"author":2,"featured_media":29331,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3738],"tags":[],"class_list":["post-29330","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-laboratory-tests"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Blood calcium levels | Badania-Medyczne.pl<\/title>\n<meta name=\"description\" content=\"Calcium (Ca) makes up 1.4-1.6% of total body weight. 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