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      Our website could be a useful learning tool if;

  • You suspect you have Primary Hyperparathyroidism (PHPT) and need help to get a diagnosis.

  • You have a diagnosis but are struggling to get a referral for surgery.

  • You have had surgery and need post-operative care or advice to help with your recovery.

  • You're a medical professional/student looking to improve your knowledge of PHPT in all classifications; hypercalcaemic, normocalcemic, normohormonal, biochemically normal PHPT.

We run two private Facebook community groups: Hyperparathyroid UK Action4Change is strictly a patient-to-patient support group. If you're a patient or relative, use the following link to submit a join request.  Please note: Scroll down to answer both questions and agree to our terms and conditions before submitting your request, or it will be automatically declined. 


Our sister group HPT UK Medical is for medical practitioners keen to learn from patient experience and/or to interact with our patient group members. Please use the following link to join:

Our primary goal is to help PHPT patients to get correct advice, and secure a timely parathyroidectomy (the only cure), performed by experienced high volume parathyroid surgeons. Clinicians are responsible for offering appropriate duty of care to hyperparathyroid patients, yet so many fall short. If patients can learn about primary hyperparathyroidism, why can't clinicians?  PHPT is only complicated when you don't understand it.


To patients; If your clinicians are confusing secondary HPT with primary HPT, please ask them to look at this site or conduct their own research. Their aim should be the same as ours, to get you healthy again. Living with PHPT year after year, is not achieving that goal. Watching and waiting for a degenerative disease to cause end-organ damage seems absurd to most people (because it is).

" You haven't fractured any bones yet, let's wait till you do."


      "You haven't got any kidney stones yet, let's wait till you do."

Actually NO, let's not wait, let's try to get you the help you need now..

DO NOT  accept the following comments without getting the exact levels. This advice can save you from a missed diagnosis.

  • your levels are normal.

  • your levels are within range.

  • your levels are not high enough to cause your symptoms.

Always know your exact blood results/ranges, i.e. (2.2 - 2.6). Get them written/printed for reference.  Some NHS Trusts top of the range for calcium is 2.5mmol/L.  

Many clinicians fail to understand how PTH and calcium influence each other. Levels simply being 'somewhere'  within the normal range, does not exclude PHPT. If only they would grasp that If both levels are near the top of the normal population reference range, they are inappropriate and you could well have PHPT. It really is that simple.

We all have a unique calcium/PTH set point. Patients with a lower set point calcium of 2.25 can feel very unwell with a calcium level of 2.54, in the same way a person with a set point calcium of 2.50 can feel very unwell with a calcium level of 2.70. It's not all about the levels, but very much about the calcium/PTH relationship, and symptoms. 


Many clinicians also fail to consider that many commonly prescribed medications, i.e. omeprazole, steroids, metformin, or certain conditions causing malabsorption can reduce serum calcium and magnesium, which can lead to a mis/missed diagnosis.

Please go to our contact page to find a link to order copies of our leaflets (5 for £3 inc P&P) 

PHPT is known to feature overproduction of parathyroid hormone (PTH) secreted by the parathyroid glands (usually 4), located behind the thyroid in the neck. Overproduction doesn't always mean 'above range', it can simply mean that it doesn't switch off production when expected to, due to malfunction of one or more glands. Most people don't even know they have parathyroid glands until they begin to malfunction.  The role of parathyroid glands is to regulate and maintain the level of calcium in our blood and bones. To determine a problem, it is necessary to test PTH and calcium together. 

PHPT is a degenerative disease. Left untreated, it will cause detrimental life quality and end-organ damage which does not occur at the same rate in all patients or according to the same levels, despite many doctors trying to convince their patients this is so.  It really isn't so.  Do not accept an unreasonably long 'watch and wait' approach, especially if you are already symptomatic. Exercise your right to a second opinion. Anxiety, depression, mood changes, asthenia (chronic fatigue), cognitive dysfunction, memory loss, bone loss (osteopenia/osteoporosis), bone pain, muscle fatigue, hair loss, dental decay, cysts/tumours elsewhere, kidney stones/gallstones, cardiac events including sudden cardiac death, miscarriage, abdominal pain/symptoms insomnia, general malaise, and feeling old, are all associated with PHPT.  If your GP or consultant says that your calcium is not high enough to cause your symptoms, they are quite mistaken. Please get a second opinion or Contact Us for advice. 

A missed/misdiagnosis often occurs because doctors or hospital labs fail to test PTH when calcium is found within the top third of the population reference range.  Please see surgical  evidence to explain normocalcemic adenomas removed from patients in our  case stories.  


Unless I'm mistaken, we've moved on from 1980. 

Not all hypercalcaemic hyperparathyroid patients will have high PTH (I've never had high PTH despite two parathyroidectomies, because I'm classed as normohormonal - SJP), and not all hyperparathyroid patients will have hypercalcemia either! The sooner all doctors realise this, the sooner we can get diagnosed and treated and stop clogging up those waiting lists, A&E and hospital corridors...

Negative scans should never prevent a referral for surgery.


We see many people with negative scans who have large adenomas found during surgery, most often found in a typical location, although some are ectopic. Some clinicians believe negative scans indicate hyperplasia only, which isn't always true. See our section about negative scans on our Common Q&As  or ask your clinicians to join our medical group to view our Gory Gallery for themselves.

If you are refused a surgical referral based on negative scans, please quote NICE guidelines (NG132); 1.4; 1.4.4;

'Proceed with surgery, performed by a surgeon with expertise in 4‑gland exploration, even if preoperative imaging has not identified an adenoma';

PHPT is a benign growth (adenoma) on one or more of the parathyroid glands. A single adenoma  has always been reported to be more common, but we have seen many cases in recent years of two adenomas, and an increasing number of people with multiple enlarged glands. When all glands are affected, it is known as parathyroid hyperplasia. Most people have four parathyroid glands usually sited behind the thyroid gland in the neck. Some have extra glands, seeding from previous parathyroid surgery, possible seeding from birth, ectopic glands in the thymus, thyroid, behind/within the carotid sheath, behind the collar bone, oesophagus, low in the chest or high in the neck.
We've seen them all.  
Healthy glands should never be removed. 

The majority of people are cured first time and go on to lead healthy lives. Some people recover at a quicker rate than others, possibly depending on the length of time before diagnosis, and also possibly depending on sufficient minerals (Magnesium and boron) and vitamin D. Symptom relief can take up to 12 months, sometimes longer, although most people report improvements quickly, with brain fog, bone pain and anxiety often reported to be the first symptoms to vanish.

r people with PHPT do have a greater chance of a genetic cause but this is not always the case. In 2022, we have seen an increased number of teenagers diagnosed with primary hyperparathyroidism.  

Please see our age survey on 
PHPT Details  and read our Case Stories. 

We see too many people with recurring or persistent PHPT following a focused parathyroidectomy (removal of one gland), often by surgeons who rely on scan results. They experience either returning symptoms, or symptoms that don't resolve after surgery. Parathyroid hyperplasia is known to affect all glands (but not necessarily at the same time) and may or may not have a genetic cause. Whilst some surgeons will agree to locate all four glands during surgery, (NICE guidelines recommend to offer patients a 4 gland exploration), others will examine glands on one side, to eliminate the risk of scar tissue should a repeat surgery be needed. However, we have seen many members with an adenoma found on both sides of the neck which raises questions about getting it right first time with a 4 gland exploration, and the relevance of intraoperative PTH testing. 

Many find supplements of magnesium, vitamin D, K2 and boron can offer some symptom relief both before and after surgery. The risk of having PHPT has always been reported to increase with age but it is not uncommon for younger people to be affected, to have had PHPT for several years before it becomes evident from symptoms or even incidental blood results.  Age should never be a barrier to surgery, which is safe and curative in over 95% of cases for all ages. Please take a look at our Common Q&A's  to read member feedback regarding age, negative scans, kidney stones, and broken bones/fractures. If you have been denied surgery based on age, please let us know.  

A UK study: 'Parathyroidectomy is safe and improves symptoms in elderly patients with PHPT':

If you suspect Primary Hyperparathyroidism, what do you need from your doctor?​ Blood tests to include in the same blood draw:

CALCIUM  - adjusted automatically to reflect albumin levels, a calcium binding protein, Ionised calcium (if levels are borderline, would help with a diagnosis, although UK providers disagree);

PTH - essential to be tested in a full EDTA vial to ensure accuracy; read why in PHPT - Details

VITAMIN D - active vitamin D would be a bonus, but very unlikely available.

MAGNESIUM (Your clinician will likely say it isn't necessary, but IT REALLY IS. Serum available mostly in UK, but RBC would be better.  Magnesium is lost in urine sooner than serum so please request  24 hour urinary magnesium. Try to keep a straight face when your doctor goes into hysterics. 

Ultrasound/Sestamibi Scan of parathyroid glands by experienced radiologist/surgeon. Some areas offer 4D CT or pet Choline scan which is preferable.

Dexa bone density scan (hip, spine and non-dominant forearm as bone loss in the wrist cortex/distal third implicates PHPT). Kidney scan (to look for stones )

Referral to an experienced parathyroid surgeon. See our page for our recommended experienced  surgeons.

Your doctor will likely not know how to offer post-operative care and advice even though you will be discharged into their care.  We offer this service via our patient support group. Realistically you will have to take charge of your own recovery, just as you had to take charge to get a diagnosis. ​The NICE guideline committee decided not to include any guidance for post op care which we don't understand. Please join our Facebook group for post-op guidance which we believe is crucial for your  wellbeing in the first few days/weeks after surgery when your body could be dealing with a significant drop in calcium and a likely need for our recommended supplements (vitamin D, magnesium, boron, calcium). Lack of awareness and guidance can result in day 3/4 calcium crash, pins and needles,  temporary hypocalcaemia/tetany requiring urgent medical attention. (worst case scenario)


We can't emphasise enough, the importance of magnesium for parathyroid patients, before and after surgery.  Magnesium is an essential cofactor when trying to raise vitamin D pre op, it's essential  post op when trying to prevent/increase a drop in calcium , its an essential partner to calcium for muscle function (obviously the heart is our biggest muscle). When presented with a patient with cardiac arrythmias, how many doctors check magnesium levels? Are the patients taking prescribed medications which reduce serum magnesium? Like omeprazole, or cinacalcet? It is essential to know that going into surgery with low magnesium increases the risk of hypomagnesemia on day one after surgery which can result in both low calcium and PTH and is known as 'The paradoxical block of PTH by hypomagnesemia.'  Always ask for magnesium to be tested with calcium and PTH. Magnesium simply being somewhere
within the normal range is not sufficient. To all clinicians, please research magnesium and the parathyroid before telling your patients they do not need magnesium tested or a magnesium supplement. We recommend magnesium glycinate or malate. 

Serum magnesium only represents 1% of our magnesium. The remaining 99% is in our bones and cells where its needed. Nearly all parathyroid patients will benefit from supplementing with magnesium. 
Research magnesium and PHPT or join our groups to read our files. This applies to both patients and clinicians: Please either do your own research or join our patient or medical groups to gain knowledge from our years of research  and patient experience, which is available for all members to read. As always, please don't just take my word for it, but do your own research. Here is just one example of what you will find:

Thousands of NHS appointments are clogging the system unnecessarily (i.e. rheumatology, urology, neurology, A&E, fracture clinics) due to poor understanding or recognition of PHPT, especially for patients with nonclassical presentations. Normocalcaemic (NCPHPT) and Normohormonal (NHPHPT) are distinct biochemical presentations of PHPT requiring the same surgery as those with classical presentation of both elevated calcium and parathyroid hormone. If your medical provider is not up to date, please ask them to do some research, seek a second opinion or contact us.  Scroll down to the bottom of this page to read the statement about NCPHPT by Shad Khan, Consultant surgeon and Governor at Oxford Hospitals.


Many doctors and endocrinologists don't appreciate that symptoms and end organ damage of osteoporosis, kidney stones and cardiovascular disease (or death) can be caused with a normal level of calcium and an inappropriately elevated PTH - NCPHPT. In our experience, many people with NCPHPT, are very symptomatic having been undiagnosed/misdiagnosed for a long time after being told 'Your Calcium is not high enough to be causing your symptoms'.  A referral to an experienced parathyroid surgeon who understands NCPHPT is recommended. Your GP can refer you directly to a surgeon for a second opinion. It is not necessary to see an endocrinologist first.  Very few endocrinologists can differentiate between primary and secondary HPT, which is astonishing to us. They just do not get hyperparathyroidism at all. We are baffled by their confusion. If your GP refuses to refer please contact us. The Hippocratic Oath appears to be no longer relevant. 

Post-operative care and advice in the UK is virtually non existent at GP and endocrine levels. The NICE guideline committee chose not to include any post op care advice.  Many patients benefit from vitamin D and mineral supplements after surgery, especially in the first few days or weeks, for hungry bones or low calcium symptoms, even if blood levels are sufficient. If a patient experiences tingling in hands, fingers, legs or face, they should not ignore these symptoms.  Remineralisation of bones begins soon after surgery. Day 3 post op calcium crash is common especially in patients who have experienced a hefty post-op drop in calcium from high pre op levels. Dietary calcium, magnesium, boron, vitamin D, K2 (except if taking blood thinners as a dose over 50mg may interfere with your medication), hydration and rest are very important the first few weeks post-op, even if your mind is active. Some will not experience relief from increased dietary calcium and may need a calcium supplement in the first few days/weeks. A third of post op patients  will experience hypomagnesemia on day one post op. We have seen people re-admitted to A&E on day 2 or 3 after surgery requiring several days of IV calcium and magnesium which could have been prevented if clinicians were aware of the need for sufficient magnesium level. Any clinician who predicts their patient will not need magnesium post op without actually knowing their levels, is talking complete nonsense.

Patients', please educate yourself about PHPT. Our site could be a useful aid to your diagnosis, journey to surgery, and beyond. Encourage doctors to read this site help you and other patients. Request a referral to a bone metabolism expert/endocrinologist on our list or recommended by us, or directly to an experienced parathyroid surgeon for the only curative treatment (parathyroidectomy). Please do not let your primary care doctor assume all endocrinologists are bone metabolism experts. This is not so.  Your doctor must refer you to appropriate secondary care consultants. Many parathyroid surgeons will accept a direct referral from your GP which can avoid unnecessarily long waiting times for endocrinology appointments. Please find out this information by contacting the secretary of your chosen surgery before asking for a referral.

Doctors, please update your knowledge of PHPT for the sake of your patients' wellbeing.  Many doctors are not up to date, which can cause delays in diagnosis and treatment. Please read PHPT Details to learn about diagnosis, symptoms, secondary hyperparathyroidism, Normocalcemic PHPT, Normohormonal PHPT, and Multiple Endocrine Neoplasia (MEN) types 1, 2, and 4. 


About US has case stories detailing prolonged diagnosis/misdiagnosis and why I began a mission to raise awareness, and campaign for quality controlled NICE treatment guidelines in 2014, which were published on 23 May 2019: The guideline committee failed parathyroid patients and let us all down with them. They were not what we asked for.  They offer no better advice than this site, but they are marginally better than no guidelines at all.  My attempts to get them revised sooner than originally planned have all been refused.

Please note this information website is not manned daily but updated periodically. Use the contact page to email Sallie Powell or send a request to join us at our Facebook support group to interact with members. 

Recommended for everyone: Follow Dr Babak Larian, and watch his monthly recorded live Q&A webcasts: 

Primary Hyperparathyroidism - Normocalcemic and Normohormonal classifications require the same cure: A parathyroidectomy performed by experienced parathyroid surgeons.

PHPT presents more commonly with elevated calcium and parathyroid hormone, but also often presents with the following classifications;

a) Elevated PTH and calcium within the normal population reference range, known as Normocalcemic PHPT (NCPHPT) or  

b) Elevated calcium and PTH within the normal population reference range, known as Normohormonal PHPT (NHPHPT).


A common question is 'Can a doctor rule out PHPT if they do not test PTH with concurrent calcium? The simple answer is No. It is crucial for doctors and hospital labs to accept PHPT can not be ruled out by looking at calcium levels alone. The usual reference range in the UK for calcium is (2.2-2.6)mmol/L. PHPT can be present with calcium of 2.4 upwards (in some cases even lower) which can be detected alongside an elevated PTH. Patients can suffer prolonged misdiagnosis impacting severely on their quality of life, on the basis their doctors or hospital labs did not test parathyroid hormone. Reasons given are calcium has to be greater than the top of the range for them to test PTH or the cost.  We would ask them to compare the cost per person of a PTH blood test against decades of treatment for the consequences of untreated PHPT. We have seen NCPHPT referred to as  'mild PHPT' yet undiagnosed patients endure years of kidney stones, gall stones, bone pain, heart disease, osteoporosis, chronic fatigue, cognitive dysfunction, depression, anxiety, and much more.  What's mild about any of those symptoms?

We believe doctors ought to be aware of the cardiac risks to patients with elevated parathyroid hormone and vitamin D deficiency. Of course many 'slip the net' because 'nearly everybody has vitamin D deficiency so we don't test it'. Refusal to also test parathyroid hormone could have dire consequences for their patients. 'Recent studies have demonstrated greater risks of cardiovascular events and mortality among persons who have lower 25-hydroxyvitamin D(25-OH) and higher parathyroid hormone (PTH) levels':


The cure for all classifications of PHPT is the same; a parathyroidectomy performed by an experienced parathyroid surgeon. We have recommended surgeons you may wish to contact: Experienced Surgeons.

A statement by Sallie Powell - Founder of HPT UK

Primary Hyperparathyroidism is a complicated name for an extremely common, yet widely under recognised and misdiagnosed endocrine condition. Parathyroid glands regulate calcium in our blood in the same way a thermostat regulates temperature. When our blood calcium becomes too low, parathyroid glands stimulate the release of calcium from our bones to bring our  blood calcium levels up.

When blood calcium becomes too high, the parathyroid glands stop stimulating the release of calcium from our bones. This perpetual motion occurs every day of our lives. If our boiler stops regulating temperature, we get it repaired. If our parathyroid glands stop regulating calcium, they need to be repaired also. Primary hyperparathyroidism occurs when one or more parathyroid glands continue to stimulate parathyroid hormone needlessly. This action causes both too much calcium in our blood, and too much calcium to be released from bones leading to osteopenia, then osteoporosis.

Left untreated, primary hyperparathyroidism begins to affect many areas of the body. Soft tissues can become calcified. Some people will form stones in their kidneys, most people will experience joint pain, cognitive dysfunction, overwhelming fatigue, anxiety, depression, insomnia, and many other symptoms listed on our website. Some people will experience heart disease leading to cardiac arrest, strokes, and sudden death. Not everybody experiences the same level of symptoms because the variance of blood calcium levels as well as the other variants like general health and fitness, diet, having other health conditions, and the length of time before treatment can impact the severity of this disease.

One of the most important messages we need to get across to doctors and endocrinologists; supposed to be experts in the field of endocrinology, whilst many are sadly lacking in their knowledge of PHPT; is the level of calcium does not determine the severity of this disease.

People who have suffered a long time with unregulated calcium may only have a marginally raised calcium level, presenting with an inappropriate parathyroid hormone level, but have osteoporosis and kidney stones, whilst someone with a considerably high calcium level picked up quickly might have fewer symptoms, no kidney stones and healthier bone density.

I campaigned for NICE guidelines for Primary Hyperparathyroidism with the help of members of my support group Hyperparathyroid UK Action 4 Change. We were registered stakeholders, and committed many hours to public consultations, hoping they would make a difference to the diagnostic failings of our doctors. We were bitterly disappointed when we saw the draft scope, as many of our comments and the evidence we supplied were dismissed. The guideline appears to have been engineered to steer patients away from the NHS and towards private treatment, with their restrictive boundaries for surgery. We are often sickened to find endocrinologists using these guidelines to deflect patients and make them wait until their calcium reaches 2.85mmol/L, they have kidney stones or osteoporosis.

Many patients will suffer years of extremely debilitating health, lose their jobs, businesses, partners, families and friends, whilst they fall apart mentally and physically.

Sadly, some will even lose their lives.

We need media attention to alert the public and the NHS to the plight of thousands whom we estimate are suffering with PHPT, which their doctors have either missed or dismissed due to their misconceptions of the severity of PHPT with lower levels of calcium, or who have been misdiagnosed as having fibromyalgia. We believe from patient experience that many diagnosed with fibromyalgia might actually have primary hyperparathyroidism. It is essential they get their calcium, PTH, vitamin D, and magnesium levels tested and that their doctors and hospital labs do not dismiss testing PTH in the presence of a normal calcium level. They must appreciate the severity of normocalcemic primary hyperparathyroidism (NCPHPT), its impact long term on their patients’ health, and that it should be treated in the same way as those with hypercalcaemic primary hyperparathyroidism.  Surgical removal of affected parathyroid glands by an experienced parathyroid surgeon is the only cure.

I feel so strongly about the misconception of normocalcemic PHPT,  I wrote and published my second book 'It's Not All About the Levels' available now on Amazon;

It's Not All About the Levels: Normocalcaemic Primary HyperPARAthyroidism (NCPHPT): Powell, Sallie: 9798357345424: Books

Doctors mostly fail to recognise and understand the relationship between calcium and parathyroid hormone.  Levels being 'within the normal range' does not mean you don't have PHPT. It is important to know where both levels fall within the normal range:

  • If you have high normal calcium and high normal or raised PTH, then you very likely have Primary Hyperparathyroidism. 

  • If your calcium is high normal and you have symptoms, your doctor should retest with a corresponding PTH

  • If you have low calcium with raised PTH, you likely have Secondary Hyperparathyroidism. Your doctor must test your vitamin D (scroll down to the bottom of this page for more information).

  • This is where it gets complicated and needs a doctor to do his/her research: 20-25% of people with a parathyroid adenoma will have calcium within the normal range and raised PTH. This is classed as Normocalcemic primary hyperparathyroidism (NCPHPT).    Scroll down to the bottom of this page to read about NCPHPT. Please look at our case stories for positive post-op stories of people with NCPHPT.

  • 22.5% of the primary hyperparathyroid population present with a raised blood calcium and a PTH level that is not above range but inappropriately detectable for its corresponding calcium level; This is classed as Normohormonal PHPT (NHPHPT). The following study explains that NHPHPT:

  • People with recurring PHPT, multiple gland disease, or who have been diagnosed with tumours elsewhere like pituitary or pancreas should be genetically tested for MEN. Please go to the next page to read the article written by Gill Masters (Amend UK MEN1 representative).


A statement from Matthew Ward (2023) - Consultant ENT Surgeon, Portsmouth Hospitals University NHS Trust;

"I've operated on several patients with significant symptoms and calcium levels in the mid to high normal range with an elevated PTH, and imaging showing abnormal parathyroid glands. They have improved symptomatically following surgery. Whilst the majority of patients with primary hyperparathyroidism do have elevated calcium levels, this is clearly not the case in all patients."

A statement from Tarek Abdel-Azziz  (2022) - Consultant  Endocrine Surgeon, London.

I advocate surgery for normocalcaemic hyperparathyroidism,  especially if the patient is symptomatic or has underlying bone disease. Symptoms can be subtle and variable, and commonly present with fatigue or brain fog. 


A statement from Shad Khan (2021) - Consultant Endocrine and General Surgeon at Oxford University Hospitals:

"Normocalcaemic hyperparathyroidism (NCPHPT) is increasingly becoming accepted as a condition requiring surgical correction - much like primary hyperparathyroidism (PHPT). In this variant, patients have an elevated parathyroid hormone level whilst displaying normal calcium levels in the blood. Nevertheless, there is a growing body of evidence that suggests that kidney stones, osteoporosis, and a multitude of symptoms found in the more conventional PHPT occur to the same extent in NCPHPT. Anecdotal evidence would suggest that a lot of benefits can be gained through surgical cure and there is growing concern about waiting until there is organ damage before offering surgery. Not many units are recognising this as yet but at Oxford, we are increasingly seeing and offering surgery for NCPHPT with quality of life dramatically improving following successful surgery "

Secondary Hyperparathyroidism

Secondary Hyperparathyroidism is an overproduction of parathyroid hormone with a secondary cause rather than primary (adenoma), often in response to a DECREASED calcium and low vitamin D. As the four parathyroid glands only purpose is to maintain normal calcium levels, they will increase the production of parathyroid hormone (PTH) if calcium is LOW. Drugs such as bisphosphonates, anticonvulsants, furosemide, and phosphorus can cause elevated PTH. In addition to drugs, disorders such as renal hypercalciuria, chronic kidney disease (GFR <60 ml/min), malabsorption syndromes (celiac disease and cystic fibrosis), and vitamin D insufficiency with plasma 25-OH vitamin D levels of <50 nmol/L (<20 ng/mL) should be ruled out. Other considerations are hypoalbuminemia, hypomagnesemia, and elevated calcitonin. We are currently researching boron deficiency as a cause of elevated PTH as well as calcium.

Known causes of secondary Hyperparathyroidism are associated with poor absorption of calcium in the intestines:

  • Gastric Bypass (GBP)

  • Vitamin D Deficiency

  • Celiac Disease

  • Crohn's Disease

  • Kidney Failure Requiring Dialysis

Some medications can interact with vitamin D supplementation such as steroids, (prednisone can reduce calcium absorption, impairing vitamin D metabolism), weight loss and cholesterol-reducing medications can reduce the absorption of vitamin D, and both phenobarbital and phenytoin used to treat epilepsy can reduce calcium absorption.

Supplementation of calcium and/or vitamin D without magnesium can lead to magnesium deficiency symptoms. High doses of vitamin D drains magnesium from its muscle storage sites. The first signs of magnesium deficiency are twitching, leg cramps, and restless legs. Angina and heart attacks affecting the heart muscle are magnesium deficiency symptoms.  600 mg of magnesium is recommended with 1/2000 IU of Vitamin D.

There is again so much information about the need for magnesium when supplementing with vitamin or calcium: 

Est. 02.09.2014

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