Tag: vitamin d tablet benefit

Can vitamin D prevent/Cure cancers:

Can vitamin D prevent/Cure cancers:

In the previous sections, we have outlined the connection between vitamin D deficiency and cancers, alongside the uncertain nature of this connection. The question arises – Can vitamin D supplementation prevent, or even cure, cancer?

This proposal has been explored by numerous researchers, who conclude there is a biological rationale (Ingraham et al. 2008, Tagliabue et al. 2015). Vitamin D appears to modify how cells function in a preventative and even anti-cancer way (Ingraham et al. 2008), such as increasing cancer cell detection (Speer 2010). Early studies comparing vitamin D levels, sun exposure and cancer showed an association with higher vitamin D levels and decreased cancer (Ingraham et al. 2008, Speer 2010). Of the cancer types, the data suggests a particularly strong association in colorectal cancer (Theodoratou et al.2014).

Despite the biological rationale, the current data is inconclusive for the role vitamin D may play in either preventing or curing cancer. The picture appears mixed for almost all cancer types (Kennel & Drake 2013). Highlighting colorectal cancer as an example of this, one large meta-analysis in 2006 showed no change in outcomes based on vitamin D supplementation and cancer incidence (Wactawski-Wende et al.2006). Yet, another study found a possible connection between increased vitamin D and calcium intake with better colorectal cancer prognosis (Yang et al. 2014).

This inconclusiveness is partly due to study limitations preventing scientists from arriving at firm and repeatable outcomes (Kennel & Drake 2013), in addition to uncertainty regarding effective and toxic treatment doses (Tagliabue et al. 2015). Some researchers support vitamin D supplementation in spite of the above, given the cheap cost of vitamin D capsules and the biological rationale (Garland et al. 2006).

Irrespective of these findings, the evidence is clear that cancer and the various established treatment choices do negatively affect patient bone health (Kennel & Drake 2013). As such, cancer patients will benefit from preventative measures, which includes vitamin D supplementation.

 

References

Garland CF, Garland FC, Gorham ED, Lipkin M, Newmark H, Mohr SB, Holick MF. The role of vitamin D in cancer prevention. Am J Public Health. 2006 Feb;96(2):252-61.

Ingraham BA, Bragdon B, Nohe A. Molecular basis of the potential of vitamin D to prevent cancer. Curr Med Res Opin. 2008 Jan;24(1):139-49.

Kennel KA, Drake MT. Vitamin D in the cancer patient. Curr Opin Support Palliat Care. 2013 Sep;7(3):272-7.

Speer G. The role of vitamin D in the prevention and the additional therapy of cancers.  Magy Onkol. 2010 Dec;54(4):303-14. [Article in Hungarian]

Tagliabue E, Raimondi S, Gandini S. Vitamin D, Cancer Risk, and Mortality. Adv Food Nutr Res. 2015;75:1-52. doi: 10.1016/bs.afnr.2015.06.003.

Theodoratou E, Tzoulaki I, Zgaga L, Ioannidis JP. Vitamin D and multiple health outcomes: umbrella review of systematic reviews and meta-analyses of observational studies and randomised trials. BMJ. 2014 Apr 1;348:g2035.

Wactawski-Wende J, Kotchen JM, Anderson GL, Assaf AR, Brunner RL, O’Sullivan MJ et al.  Calcium plus vitamin D supplementation and the risk of colorectal cancer. N Engl J Med. 2006 Feb 16;354(7):684-96.

Wranicz J, Szostak-Węgierek D. Health outcomes of vitamin D. Part II. Role in prevention of diseases. Rocz Panstw Zakl Hig. 2014;65(4):273-9.

Yang B, McCullough ML, Gapstur SM, Jacobs EJ, Bostick RM, Fedirko V et al. Calcium, vitamin D, dairy products, and mortality among colorectal cancer survivors: the Cancer Prevention Study-II Nutrition Cohort. J Clin Oncol. 2014 Aug 1;32(22):2335-43.

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Vitdcancer team.

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Vitamin D basics

Vitamin D basics

Vitamins are nutrients that are vital to the human body yet cannot be synthesized by it. In this post, we’re going to introduce you to the basics of vitamin D so that you can find the future posts addressing its relationship with cancer enjoyable and easier to read.

What is vitamin D?

Vitamin D is one of the fat-soluble vitamins and can only be obtained by either getting exposed to sunlight, eating certain foods, or taking supplements. Generally speaking, vitamin D exists in two forms inside the human body: the storage form (25OHD) and the active form (1,25OHD). Physicians usually order lab tests that measure the level of these forms in order to identify vitamin D abnormalities (Mahan & Raymond, 2017); (Holick, et al., 2011).

What does it do?

Vitamin D plays various roles inside the human body: It helps strengthening the bones, regulating blood calcium, and has been under investigations for years for possible cancer and diabetes risk reducing effects (Holick, et al., 2011). It also has hormonal-like functions at the level of nucleus and genes (i.e. affecting cell growth, muscle strength and size gains, & reducing inflammation) (Mahan & Raymond, 2017); (Dorfman, 2017).

How much is enough/too much?

It’s not surprising that vitamin D’s requirements (i.e. recommended daily allowances (RDA)) vary according to age, sex and stages like pregnancy and lactation. Interestingly, vitamin D can also cause toxicity if taken in huge amounts so a level called tolerable upper limit (TUL) has been set in order to help prevent that. For more information please check the following table. (Mahan & Raymond, 2017)

Section1 req

Tips & tricks:

– Sun exposure is the best source for vitamin D. It can supply people with a huge amount that can last them for an extended period of time (i.e. those adequately exposed in summer get enough stores that can last them through the winter). (Mahan & Raymond, 2017).

– For the best results, ditch the sunscreens and expose at least your arms and legs to sunlight directly (i.e. not through glass) for the duration that results in your skin turning slightly pink after 24 hours (Dark-skinned individuals need 3-5 times the duration needed by fair-skinned ones). Vitamin D synthesis is maximum between 11:00am and 3:00pm in the summer and people generally need 2-3 days of exposure per week. (Mahan & Raymond, 2017); (Holick, et al., 2011).

– Some apps can help time the exposure correctly (i.e. Vitamin D calculator, D-minder, & Vitamin D pro). (Mahan & Raymond, 2017).

– For vitamin D content of various sources please check the following table:

Sources

References and attributions:

Dorfman, L., 2017. Nutrition in Exercise and Sports Performance. In: L. K. Mahan & J. L. Raymond, eds. Krause’s Food and the Nutrition Care Process. 14th ed. St. Louis: Elsevier.

Holick, M. F. et al., 2011. Evaluation, Treatment, and Prevention of Vitamin D Deficiency: an Endocrine Society Clinical Practice Guideline. J Clin Endocrinol Metab, 96(7), p. 1911–1930.

Holick, M. F. et al., 2011. Evaluation, Treatment, and Prevention of Vitamin D Deficiency: an Endocrine Society Clinical Practice Guideline. J Clin Endocrinol Metab, 96(7), pp. 1915 & 1917, TABLES 1 & 3.

Mahan, L. K. & Raymond, J. L., 2017. APPENDIX 45: Nutritional Facts on Vitamin D. In: L. K. Mahan & J. L. Raymond, eds. Krause’s Food and the Nutrition Care Process. 14th ed. St. Louis: Elsevier.

OpenStax, 2014. “Figure 1. Sunlight is one source of vitamin D” licensed by Rice University under a Creative Commons Attribution License (by 3.0). It got slightly edited and is used by our post as its featured image. It can be found here: http://cnx.org/contents/FPtK1zmh@6.27:g-vsB2Y2@4/Exercise-Nutrition-Hormones-an.

More readings and links:

https://medlineplus.gov/vitamind.html

http://www.eatright.org/resource/food/vitamins-and-supplements/types-of-vitamins-and-nutrients/vitamin-d

https://www.eatrightontario.ca/en/Articles/Vitamins-and-Minerals/What-you-need-to-know-about-Vitamin-D.aspx

https://itunes.apple.com/gb/app/vitamin-d-calculator/id484286798?mt=8

https://play.google.com/store/apps/details?id=com.ontometrics.dminder&hl=en_GB

https://itunes.apple.com/gb/app/d-minder-pro/id547102495?mt=8

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Please leave a comment below if you have any questions and subscribe to get notified about new posts.

Best wishes,

Vitdcancer team.