Vitamin D3 (10,000iu)

High-Strength (Cholecalciferol) Clean, Safe, Effective (Bioavailable)
90 x 10,000iu (Softgels)

High Strength 10,000iu Vitamin D3 soft gelatine capsules, easy to swallow and easily assimilated. Vitamin D is naturally produced by the body when the skin is exposed to sufficient sunlight. Many people have low Vitamin D levels due to lack of sunlight and diet due to modern farming practises and our generally low consumption of fresh uncooked fruits and vegetables. Studies show that the higher your Vitamin D level, the lower your risk of major health problems.

£19.99 £16.66
In stock
EU/World Prices

At Ancient Purity we believe Vitamin D3 is one of the most important supplements you can and should take, everybody needs it and everyone functions better with higher levels, it’s at the very top with MSM Organic Sulphur, Magnesium and Fulvic Acid Minerals. The European Journal of Clinical Nutrition states that increasing your levels of Vitamin D would cut premature death by 21%, and extent your healthy lifespan by more than 2 years (and that's quality, not just quantity). Vitamin D is not actually a vitamin, it was wrongly classified as such but the name never changed. Vitamin D actually is a fat-soluble precursor hormone part of the steroid hormone in your body called calcitriol that the human body can produce naturally. Calcitriol regulates Phosphorus, Calcium, and Bone Metabolism and Neuromuscular function in the body. 

There are multiple forms of Vitamin D, the two most important ones are Vitamin D-2 & Vitamin D-3. Vitamin D3 is also known as cholecalciferol, which is made by your skin naturally. Ancient Purity Vitamin D3 is an incredibly powerful 10,000IU (international units) softgels. A healthy person will naturally synthesise around 10,000–15,000 IU of Vitamin D3 in the skin soon after sun exposure, there are no negative effects. We want to be clear that we are not in the business of checking and managing Vitamin D levels, for us personally we use high doses all the time and we use way more during the dim winter months, we urge you to research this yourself, then please come to us for the best in Vitamin D3 at an Eco price. Let's tell you as much as we can about this "Wonder Hormone" in one web page.

Vitamin D3 (10,000iu) Information & Points to Research

  • High Dose 10,000 Softgels. 
  • Therapeutical Grade - Bioavailable.
  • Preferred form, Cholecalciferol Vitamin D3.
  • Immunity.
  • Hair, Skin, Teeth, Nails.
  • Respiratory Health.
  • Hearts & Bones.
  • Pregnancy.
  • Brain Function.
  • Clean, Safe and Effective.
  • Stored in Miron Dark Violet Glass.
how much vitamin d3 should I take summer

Vitamin D Deficiency

Medical researchers have been sounding the alarm about the importance of maintaining optimal Vitamin D levels from childhood through to the adult years, but millions of ageing adults remain grossly deficient in this critical hormone-based nutrient. Every cell in the body is now known to have Vitamin D receptors where the nutrient provides an essential key to accurate DNA and cellular replication. Vitamin D works at the genetic level to lower the incidence of mutations and improve cellular replication.

Currently there are over 34,000 scientific investigations on how vitamin D works in the human body, yet it is still largely ignored by the general population. Deficiency of Vitamin D is often one of the last things someone considers when they are in a less than healthy state. As we will discuss later, it's hard to agree on the exact amount we need, there is staying alive, then there is thriving, If you use optimal levels of Vitamin D as the standard for deficiency, we see that as many as 90% of people in the western hemisphere have deficiency. If you are dark skinned living in a country where there is less sun you may be even more at risk.

Many people are deficient because they aren’t able to obtain enough Vitamin D through direct sunlight and their diet alone, and they aren’t taking a high-quality supplement or the supplement simply doesn't have enough D3 in it. Once thought of as only playing a role in certain diseases, researchers now realise that Vitamin D affects virtually every cell and tissue in your body. And it affects numerous Vitamin D receptors located throughout your body and nearly 3,000 genes. Your cells need the active form of vitamin D to unlock the genetic blueprints stored inside the cell. Without these crucial blueprints, these aspects of your health could potentially be at risk.

Unity in Immunity Vitamin D is for everyone

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Vitamin D3 - The Ultimate in Immunity

Along with Vitamin C Vitamin D3 is at the very top of Immunity nutrients. Low levels of Vitamin D may be the main reason for many immune problems and infections. Vitamin D aids in cell replication and is thought to help protect against the development of autoimmune conditions and infections like the cold. Vitamin D may also help prevent prolonged inflammation, which is often considered to be at the root of many chronic conditions and health problems. Studies show that inflammation may play a part in heart disease, diabetes and cancer along with a wide range of inflammatory conditions.

Vitamin D activates our immune defenses. T-cells are a type of white blood cell that is essential for human immunity. Though there are several kinds of T-cells, it can be broadly categorised as killer T-cells and helper T-cells. Killer T-cells seek out and destroy cells that are damaged or infected. Helper cells “help” the body orchestrate an immune response. In all of these functions, Vitamin D is of utmost importance. Research studies prove that D3 triggers T-cells through the Vitamin D receptor. If we are deficient, then T-cells remain dormant and unable to seek out and destroy foreign pathogens. It strengthens our innate immunity, the innate immune system response serves as the front-liner against pathogens like viruses, bacteria, and fungi. Once it identifies a foreign invader, its first task is to trigger a series of events to destroy the possible cause of disease or infection and Vitamin D3 helps in feeding this mechanism.

Researched and Studied for Immunity

Studies on the antimicrobial potency of Vitamin D showed that it up-regulates our body’s production of anti-microbial peptides, particularly cathelicidin. Aside from cathelicidin’s ability to directly stop microbial activity, it can also prompt specific defense responses within the body. On the subject of the body’s specific defense, Vitamin D3 also improves adaptive immunity. This significantly shortens the course of the infection and helps the body recover faster. This immune-boosting benefit is proven and illustrated in a study of 800 military recruits in Finland. The subjects who had lower vitamin D lost more days of active duty from respiratory and other infections. Studies have also shown the effect of D3 on the rates of influenza and bacterial vaginosis. The common denominator among those studies is the relationship between low Vitamin D levels and increased frequency of infection. Several studies in animal models show that specific autoimmune diseases can actually be prevented or managed by the administration of Vitamin D3 to patients. Conditions include inflammatory bowel diseases, collagen-induced arthritis, type 1 diabetes, autoimmune encephalomyelitis, and lupus. 

Some studies have also linked low Vitamin D levels to the development of multiple sclerosis, rheumatoid arthritis, diabetes, and lupus. Even low Vitamin D exposure of babies within the uterus is associated with the increased risk of pancreatic autoimmunity. Vitamin D also has the ability to suppress autoimmunity. Long-term inflammation can cause and aggravate a number of health conditions. But Vitamin D3 can really help against this. A study of 2,070 adult individuals over the age of 65, concluded that low Vitamin D level is linked to moderate and severe pain from inflammation. A separate research reinforced this idea by proving that Vitamin D lowers inflammation. Upon administration, Vitamin D lands on the Vitamin D receptor to start core gene signalling that reduces inflammation. It regulates the production of inflammatory cytokines and stops the proliferation of pro-inflammatory cells.

Every Body needs Vitamin D3

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Vitamin D3 for Lungs & Respiratory Support

The understanding of Vitamin D metabolism and biological effects has increased so much in recent years, it's clear Vitamin D has extensive immunomodulatory effects. The active Vitamin D generating enzyme, 1α-hydroxylase, is expressed by the airway epithelium, alveolar macrophages, dendritic cells, and lymphocytes indicating that active Vitamin D can be produced locally within the lungs. Vitamin D generated in tissues is responsible for many of the immunomodulatory actions of Vitamin D.

The effects of Vitamin D within the lungs include increased secretion of the antimicrobial peptide cathelicidin, decreased chemokine production, inhibition of dendritic cell activation, and alteration of T-cell activation. These cellular effects are important for host responses against infection and the development of allergic lung diseases like asthma. Epidemiological studies do suggest that Vitamin D deficiency predisposes to viral respiratory tract infections and mycobacterial infections and that Vitamin D may play a role in the development and treatment of asthma. Randomised, placebo-controlled trials are lacking but ongoing.

High Strength, Ultimate Purity

ancient purity's vitamin d3 immunity

It Keeps Giving

  • Weight-loss

Having trouble shedding stubborn belly fat even with diet and exercise?, Now might be the time to consider Vitamin D to make sure you’re meeting your daily needs. Research suggests that there may be a connection between obesity and D3 deficiency, with some studies even showing that getting enough of this key vitamin could also aid in weight loss.

One study showed that women who met their requirements for vitamin D lost 7ibs more than a placebo group over a one-year period. Meanwhile, another study showed that having a higher amount of body fat was associated with lower levels of vitamin D in the blood. However, it’s still unclear whether obesity may increase the risk of vitamin D deficiency or if obesity may contribute to low vitamin D status. More research is still needed to understand the complex role that vitamin D may play in weight control..

  • Heart Health

Continuing research on Vitamin D's effect on the heart show deficiency as a risk factor for major heart problems and the conditions associated with cardiovascular issues, such as high blood pressure and diabetes.

Dr Erin Michos, Assistant Professor of Medicine at Johns Hopkins Hospital in the Division of Cardiology, examined and contributed a great deal of data on Vitamin D deficiency and the heart, including a study published in the Archives of Internal Medicine.

She stops short, however, of stating that raising Vitamin D levels lowers the risk of cardiovascular disease. “Now that we have identified this risk factor for heart disease, the question is, if you’re deficient and I give you Vitamin D back, can I actually prevent a heart attack?” Dr Michos believes that question will be answered more conclusively by large clinical trials.

Vitamin D3 Feeds your Body, Get Energised Now

ancient purity high dose vitamin d3 soft gels 10000 international units

Tooth, Nail and Bone Support

Our teeth’s enamel (the barrier protecting your teeth) is mainly made up of calcium and phosphate, Vitamin D plays an important role by increasing the absorption of the calcium and phosphate from foods. Getting Vitamin D by the sun or by supplement you keep your enamel strong and help fight the bacteria responsible for dental caries among other dental health issues. Vitamin D supports bone density too.

A severe Vitamin D deficiency example is rickets, a condition that affects children and is characterized by bone abnormalities and reduced bone mineral density. Although rickets is incredibly rare these days, other bone-related disorders such as osteoporosis are still very common. Not only has Vitamin D deficiency been linked to an increased risk of osteoporosis, but it’s also been tied to decreased bone mineral density and a higher risk of fractures in older adults. 

Stay Lean and Supple with Vitamin D3


Vitamin D3

  • Fights the risk of major health issues.
  • Support Lung function.
  • Cardiovascular / Heart health.
  • Brain Health & Mood Balance.
  • Seasonal Health Support.
  • Healthy Pregnancy - deficiency could risk of developing preeclampsia and needing a cesarean section.
  • Low Vitamin D is associated with gestational diabetes mellitus and bacterial vaginosis in pregnant women.
  • Helpful in the maintenance of muscle & bones.
  • Plays a role in the maintenance of normal teeth.
  • Normal function of the immune system.
  • Insulin regulator, diabetic management.
  • Absorption/utilisation of calcium & phosphorus.

Let the power of the sun into your life

10,000 IU vitamin D3 organic ancient purity

Vitamin D3 - Brain & Mood Supportive

Some studies have even shown that a vitamin D deficiency could be associated with a higher risk of developing conditions like schizophrenia. Further research has also found that vitamin D status may also influence depression, anxiety, seasonal affective disorder and insomnia. 

Getting enough vitamin D may also bump up brain power as well. One study published in The American Journal of Geriatric Psychiatry even reported that lower levels of Vitamin D may be linked with poor performance on standardised exams, difficulties with attention and focus as well as impaired decision making.

Set your mind at ease with Vitamin D3

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Vitamin D3 Levels

The important factor when it comes to vitamin D is your serum level, which should ideally be between 50-70 ng/ml year-round, and the only way to determine this is with a blood test. Healthy sun exposure is the preferred method, but this Vitamin D3 supplement can be used when necessary, in fact taking Vitamin D3 whilst enjoying the sun may actually help a healthy tan.

Most adults need about 8,000 IU's of Vitamin D per day to achieve optimal serum levels. If you choose to take our Vitamin D3 supplement, make sure you're getting enough Vitamin K2. Fermented vegetables can be a great source of vitamin K2 if you ferment your own using the proper starter culture. Gouda and Edam cheese are also good sources. But do see below for some K2 options.

The Essential Nutrient for Everyone

organic vitamin d3 supplement

Ancient Purity's Thoughts on dosage

Now all that said what do we currently think... studies have shown that 30 minutes in sunlight could be as much as 10,000 - 20,000 iu's of Vitamin D. Personally if i can i will spend the whole day in the sun in the summer as much as possible. If i've wroked in the garden for 8 hours that could be 160,000 - 320,000 iu's of Vitamin D.

Now we all know we feel happier and better in the sun, but the sun is very different from a softgel capsule. The question I have never really had answered is how much can we take. It seems we all vary on what we need given our ethnicity and skin type. Lots of health experts have an idea, a doctor might prescribe 600iu's.

There is a difference between taking enough to not be deficient and enough to thrive. Ultimately you have to make the choice of how much you want to take because I believe there is no exact science on how much an individual needs.

Let the Power of the Light in... Vitamin D3

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Vitamin K2 with Vitamin D3

Personally I take more Vitamin D3 in the winter months but still top up with three 10,000iu softgels a week in the summer. Years ago when we posted this supplement online saying we now stock it, people commented no Vitamin K2. The question again is, are all the people who spend a day in the sun, getting a massive dose and the benefits eating a K2 rich diet? All those living in the tropics.

I don't think they are, I believe it helps and is a great supplement alone too but in my opinion you can still reap massive Vitamin D3 benefits without having to take or eat for Vitamin K2. Again Ancient Purity is all about lifestyle, mind, body and spirit, you must have control of all to be really healthy, so think, research and decide for yourself.

For those of you wanting to get K2 via food here are some Vitamin K2 rich foods... Spinach, Swiss Chard, Chick Peas (ideally fermented)Turnip Greens, Mustard Greens, Brussels Sprouts, Parsley, Romaine Lettuce, Broccoli. Asparagus, Collard Greens, Celery, Green Beans, Leeks, Cabbage, Basil, Thyme, Sage, Kale. 

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  • Vitamin D3 (as Cholecalciferol) From Lanolin 
  • Extra Virgin Olive Oil and softgel capsule - Gelatin, Vegetable Glycerin water.

FREE FROM: Yeast, wheat, gluten, milk, egg, fish, shellfish or nut tree ingredients. 
Produced in a facility that processes other ingredients containing these allergens. 

Remember Vitamin D is actually a hormone. It was wrongly classified originally as a vitamin. Like any supplement but particularly with hormones, one should get the dose right. Your doctor can test your Vitamin D levels which should be done before supplementation to see if you have a deficiency, then again one month after supplementation to see if the supplemental dose is correct or needs adjustment. It is vital that enough Magnesium is consumed when supplementing with Vitamin D. Similarly one must ensure adequate intake of Vitamin K2 from a food source such as pasture fed dairy, meat and eggs, natural or a supplement, the best being Vitamin K2 Mk7. Many experts suggest between 1000iu to 10,000iu per day. 

Ancient Purity: Well I take 3 capsules a week, I also get on a sunbed now and zen which makes me feel great during winter.  If you do use a sunbed make sure you use it intelligently and consume lots of vegetables and consider Astaxanthin, Chlorella and Spirulina supplementation.

Dr Mercola recommends, at the time of writing, that optimal levels are 50 to 70nmo/l and that particularly severe conditions may require 70 to 100nmo/l. He suggests that 10,000iu's might be an appropriate dose but insists that you ask your Dr for a blood test before beginning vitamin D supplementation, which is our recommendation too.

Dr Gonzalez famous for his remarkable cure rates believes that patients suffering from the serious condition in which some of the body's cells grow uncontrollably and spread to other parts of the body may need less than Dr Mercola recommends and his protocol is more like Dr Grant's opinion below.

Dr William Grant who has extensively studied Vitamin D estimates that for the average European, a blood level of Vitamin D is around 54nmol/L. Upping levels to 100 to 125nmol/L reduces mortality in a whole range of conditions. According to Dr Grant "It is important for optimal health to keep Vitamin D blood levels above 100 nmol/L. That is difficult in the UK due to the high latitude and frequent cloud cover and modern lifestyle. It takes about 3,000 to 5,000iu's a day for most people to reach this level. We asked him what he takes: "I take 50,000iu of vitamin D3 every two weeks (that's about 3,500iu a day); my blood level is 168 nmol/L, and in the summer I am now shooting for 15-20 minutes of sunlight near solar noon with shirt off on clear days.

NOTE: Get your Vitamin D levels checked by the doctor (FREE IN UK) before using a vitamin D supplement and retest after a few months. Each persons need for Vitamin D is individual. We're all different in our ability to make Vitamin D so it's difficult to assess individual needs, given variations in sunlight exposure, skin colour, diet, lifestyle and complicating factors such as liver conditions or how many Vitamin D receptors are actually expressing and active. Following correct sun exposure one should remember that Vitamin D will take 48hrs to be fully absorbed, if you shower after correct sun exposure, remember that scrubbing with soap will diminish the Vitamin D, however just showering with water will not. You can then use soap on the essential areas like the groin and under arms while using water on the rest, this will give you the maximum benefit from you time in the sun.

  • Brand: Ancient Purity.
  • Size: 10,000 IU's.
  • Quantity: 90.
  • Container: Miron Glass Jar.
  • Storage: Keep in a cool dry place, keep out of reach of children.
  • Estimated shelf life from purchase: 2 years.

Q - Can you explain Vitamin D levels how to get them checked and what it means?
A - The Vitamin D level is the concentration of 25(OH)D in your blood. The serum 25(OH)D concentration is accepted as the nutritional biomarker of Vitamin D sufficiency. Vitamin D levels are higher in summer/autumn, and lower in winter/spring. The Vitamin D level reflects both sun exposure and Vitamin D intake. It is the marker of Vitamin D availability to tissues, including the immune system.  Individuals vary in their Vitamin D levels and in their response to efforts to increase these levels. A simple blood test can determine your current Vitamin D level. To check your Vitamin D level, ask your health care provider for a 25(OH)D blood test. Your health care provider can then advise you on whether you need to increase your Vitamin D level. 

Q - Is Vitamin D a Vitamin or a Hormone?
A - Although it’s called a Vitamin, Vitamin D is really a hormone and not actually a vitamin. Vitamins cannot be produced by our bodies. We get them from dietary sources, whereas Vitamin D is made in your body. It’s your body’s only source of calcitriol (activated Vitamin D), the most potent steroid hormone in the body.

Q - What does Vitamin D do?
A - Like all steroid hormones, Vitamin D is involved in making hundreds of enzymes and proteins, which are crucial for preserving health and preventing disease. It has the ability to interact and affect more than 2,000 genes in the body. It enhances muscle strength and builds bone. It has anti-inflammatory effects and bolsters the immune system. It helps the action of insulin and has anti-bad cells activity. This is why Vitamin D deficiency has been linked with so many of the health issues of modern society. Because of its vast array of benefits, maintaining optimal levels of Vitamin D is essential for your health.

Q - Where else do I get Vitamin D from?
A - Only about 10% of your Vitamin D comes from diet, so it is nearly impossible to get adequate amounts of Vitamin D from your diet. The only 2 reliable sources of vitamin D are the sun and supplements like Ancient Purity’s Softgels. Sunlight exposure is the only reliable way to generate Vitamin D in your own body. Vitamin D is produced by your skin in response to exposure to ultraviolet radiation from the sun. In fact, this is such an efficient system that most of us make 20,000 units of Vitamin D after only 20 minutes of summer sun without suntan lotion. That’s 100 times more than the government recommends per day! There must be a good reason why we make so much in so little time. But these rays cannot penetrate glass to generate Vitamin D in your skin, so you don’t generate Vitamin D when sitting behind a glass window, whether in your car or at home. Also sunscreens, even weak ones, almost completely block your body’s ability to generate Vitamin D.

The other reliable source is supplements. Most important is that you take vitamin D3, (cholecalciferol) the active form of Vitamin D. Do not take vitamin D2 as it is not as biologically active and effective, and nor as safe as vitamin D3. And taking the right amount is crucial. Most doctors tend to under dose. The current recommendations from the Food and Nutrition Board of the U.S. Institute of Medicine: from 200 to 600 IU/day depending on one’s age, are way too low. These values were originally chosen because they were found to prevent bone softening issues.

Q - How much sunshine do you need?
A - All living things need sun, the key is balance. Too much sun exposure can cause melanoma and skin ageing, while too little creates an inadequate production of Vitamin D. The amount needed depends on the season, time of day, where you live, skin pigmentation and other factors. As a general rule, if you are not Vitamin D deficient, about 20 minutes a day in the spring, summer and fall on your face and arms or legs without sunscreen is adequate. It doesn’t matter which part of the body you expose to the sun. Many people want to protect their face, so just don’t put sunscreen on the other exposed parts for those 20 minutes.

If you live north of 37 degrees latitude (approximately a line drawn horizontally connecting Norfolk, Virginia to San Francisco, California) sunlight is not sufficient to create Vitamin D in your skin in the winter months, even if you are sitting in the sun in a bathing suit on a warm January day! The further you live from the equator, the longer exposure you need to the sun in order to generate Vitamin D

Q - Can I take cod liver oil to get my Vitamin D?
A - Although Cod liver oil contains a fair amount of Vitamin D, it also contains high amounts of vitamin A. Vitamin A antagonises the action of Vitamin D and can be toxic at high levels.

Q - What are other food sources of Vitamin D?
A - Fatty wild fish like mackerel, salmon, halibut, tuna, sardines and herring, fortified milk, orange juice and cereal, dried Shitake mushrooms and egg yolks. To get adequate amounts of Vitamin D from food, you would have to eat at least 5 servings of salmon a day or drink 20 cups of fortified milk.

Q - My doctor prescribed Drisdol, 50,000 IU per week. What is it?
A - Drisdol is a prescription of 50,000 IU tablets of vitamin D2 or ergocalciferol. Ergocalciferol is not Vitamin D but it is similar. D2 is not normally found in humans and most studies show it does not raise 25(OH)D levels as well as (cholecalciferol or vit D3) does. If you are Vitamin D deficient, the best thing to do, is to take Vitamin D3

Q - Why using tanning beds to get my Vitamin D?
A - We personally like them, see our Sunbeds article.

Q - Do the capsules need to be refrigerated?
A - No.

Q - What's The Difference Between Vitamin D2 and Vitamin D3?
A - Two different forms of Vitamin D are used in supplements and fortified foods. Vitamin D2, also called ergocalciferol, is manufactured through the ultraviolet irradiation of a substance called ergosterol that comes from yeast. Vitamin D2 is vegan. Vitamin D3, also called cholecalciferol, is made by the ultraviolet irradiation of a substance derived from sheep's wool. Some research suggests that Vitamin D2 and Vitamin D3 are absorbed equally well, although other studies suggest that Vitamin D3 is better absorbed. If you are treated for a Vitamin D deficiency, you may find that your health care provider recommends taking a higher dose of Vitamin D2 than of Vitamin D3 to compensate for possible differences in absorption. This is an area of active research that we will continue to follow.

Q - Is Vitamin D3 recommended for breast-fed babies?
A - Breast milk is the ideal food for infants. Human milk, however, contains little Vitamin D. If a nursing mother is Vitamin D-deficient, her breast milk will be even lower in Vitamin D than usual. To prevent Vitamin D deficiency in breast-fed babies, the American Academy of Pediatrics recommends that breast-fed babies be given a 400 IU/day Vitamin D supplement beginning within the first few  days after birth. Another possible way to prevent Vitamin D deficiency in a breast-fed infant is for the mother to take a Vitamin D supplement daily containing up to 4,000 IU of Vitamin D3. High-dose Vitamin D supplements, used by the lactating mother, have been shown to markedly increase breast milk Vitamin D content. While there is some possibility that a baby will be able to make adequate Vitamin D following sunlight exposure, there are many factors that interfere with Vitamin D production (skin pigmentation, pollution, kind of season, amount of clothing, location, and sunscreen). This is why supplemental Vitamin D is recommended.

Q - Your Vitamin D3 capsules are 10'000 IU yet I’ve found smaller amount D3 capsules that are larger than yours, please explain?
A - This is simply down to the other ingredients. Some companies might put sunflower oil or olive oil to fatten up the capsules.

Scientific Articles

Harvard Medical School - Vitamin D and your health: Breaking old rules, raising new hopes

Scientific Reports - Analysis of vitamin D level among asymptomatic and critically ill COVID-19 patients and its correlation with inflammatory markers


Supporting Scientific Research

  1. Willis, K.S., D.T. Smith, K.S. Broughton, and D.E. Larson-Meyer (2012). Vitamin D status and biomarkers of inflammation in runners. Open Access J. Sports Med. 3:35-42.
  2. Sonneville, K.R., C.M. Gordon, M.S. Kocher, L.M. Pierce, A. Ramappa, and A.E. Field (2012). Vitamin D, calcium, and dairy intakes and stress fractures among female adolescents. Arch. Pediatr. Adolesc. Med. 166:595-600.
  3. Sato, Y., J. Iwamoto, T. Kanoko, and K. Satoh (2005). Low-dose vitamin D prevents muscular atrophy and reduces falls and hip fractures in women after stroke: a randomized controlled trial. Cerebrovasc. Dis. 20:187-192.
  4. Chlebowski RT, Johnson KC, Kooperberg C, Pettinger M, Wactawski-Wende J, Rohan T, et al. Calcium plus vitamin D supplementation and the risk of breast cancer. J Natl Cancer Inst 2007;100:1581-91.
  5. Jiang X, Dimou NL, Al-Dabhani K, Lewis SJ, Martin RM, Haycock PC, et al. Circulating vitamin D concentrations and risk of breast and prostate cancer: A Mendelian randomization study. International Journal of Epidemiology 2019;48:1416-24.
  6. Taylor CL, Rosen CJ, Dwyer JT. Considerations in dietetic counseling for vitamin D. J Acad Nutr Diet 2019;119:901-9.
  7. Brown LL, Cohen B, Tabor D, Zappala G, Maruvada P, Coates PM. The vitamin D paradox in Black Americans: A systems-based approach to investigating clinical practice, research, and public health—expert panel meeting report. BMC Proceedings, 2018;12(Suppl 6):6.
  8. Institute of Medicine, Food and Nutrition Board. Dietary Reference Intakes for Calcium and Vitamin D. Washington, DC: National Academy Press, 2010.
  9. Silva MC, Furlanetto TW. Intestinal absorption of vitamin D: A systematic review. Nutr Rev 2018;76:60-76.
  10. Taylor CL, Patterson KY, Roseland JM, Wise SA, Merkel JM, Pehrsson PR, Yetley EA. Including food 25-hydroxyvitamin D in intake estimates may reduce the discrepancy between dietary and serum measures of vitamin D status. J Nutr 2014;144:654-9.


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