![Vitamin D & Cancer Risk](https://www.clearvuehealth.com/images/vitamind-cancer-risk_title.jpg)
Background
![](https://clearvuehealth-assets.s3.amazonaws.com/15953320930234480.png)
Why Vitamin D Matters
Vitamin D is one of the most important vitamins. It plays an important role across systems throughout your body, not just your bones. Recently, studies have linked Vitamin D levels to cancer risk.
what is it?
where to get it
Key Facts
- typefat soluble
- sourcediet, skin
- other namescalciferol, cholecalciferol
Appearance
![](https://clearvuehealth-assets.s3.amazonaws.com/1595285339927099.png)
Use List
![](https://clearvuehealth-assets.s3.amazonaws.com/15952886422803469.png)
bone growth
![](https://clearvuehealth-assets.s3.amazonaws.com/15952886689397028.png)
calcium
![](https://clearvuehealth-assets.s3.amazonaws.com/15952886857826219.png)
immunity
![](https://clearvuehealth-assets.s3.amazonaws.com/15953320930234480.png)
the sun
your body can create vitamin D with assistance from the sun
![](https://clearvuehealth-assets.s3.amazonaws.com/15953326334686056.png)
diet
some foods such as milk and fish contain vitamin D
![](https://clearvuehealth-assets.s3.amazonaws.com/15953327005497716.png)
supplements
Vitamin D can also be obtained from dietary supplements
Key facts: Vitamin D plays a key role in bone growth, calcium absorption, and your immune system. Unlike some vitamins, your body can produce it with the help of the sun. Sunlight helps catalyze a key reaction in the production of Vitamin D.
Study
![](https://www.clearvuehealth.com/images/vitamind-cancer-risk_Coloncancer.jpg)
A Case-Control study of 179 colorectal cancer patients and 356 matched controls found that high Vitamin D levels in the blood was associated with a significantly lower risk of developing Colon Cancer and Colorectal Cancer compared to having low levels of Vitamin D in the blood.
![](https://www.clearvuehealth.com/assets/15912228081583391.png)
What this means
This study showed that vitamin D levels in the blood correlated with a lower risk of developing Colon Cancer and Colorectal cancer. While it doesn’t say whether vitamin D is causing a benefit, it does show that those who have lots of vitamin D tend to have a lower risk.
![](https://www.clearvuehealth.com/icons/linkicon.png)
Author Quote
"We investigated this relationship in a nested case-control study within the Health Professionals Follow-up Study (HPFS), a large ongoing study of male health professionals living in the United States.......Our data provide additional support for the inverse association between vitamin D and colorectal and, in particular, colon cancer risk."
Study
![Vitamin D & Breast Cancer Risk](https://www.clearvuehealth.com/images/vitamind-cancer-risk_breast-cancer.jpg)
This study found that individuals with high vitamin D levels had a significantly lower risk of breast cancer compared to those with low Vitamin D. This was calculated by combining data from 11 studies, a meta-analysis, and was found to be statistically significant.
![](https://www.clearvuehealth.com/icons/linkicon.png)
From the study
"This study supports the hypothesis that higher serum 25(OH)D levels reduce the risk of breast cancer. According to the review of observational studies, a serum 25(OH)D level of 47 ng/ml was associated with a 50% lower risk of breast cancer."
![](https://www.clearvuehealth.com/assets/15912228081583391.png)
Why This Matters
Similar to the Colon Cancer data, this research further demonstrates that those who have high vitamin D levels in their blood have a significantly lower risk of developing cancer.
Negative Clinical Trial Results
![](https://clearvuehealth-assets.s3.amazonaws.com/15912228081583391.png)
Supplements may not work
While having high blood levels of Vitamin D shows clear benefits, taking vitamin D supplements may not show benefits for cancer risk as shown by the study below.
![Vitamin D & Invasive Cancer Risk: Clinical trial results chart](https://www.clearvuehealth.com/images/vitamind-cancer-risk_clinicaltrial.jpg)
A clinical trial showed that vitamin D supplements did not reduce cancer risk. Researchers studied 25,871 participants over 5.3 years. Participants were randomized to receive either a placebo or a daily vitamin D supplement.
![](https://www.clearvuehealth.com/icons/linkicon.png)
From the study:
"In this large primary-prevention trial, supplementation with vitamin D3 (at a dose of 2000 IU per day) did not lead to a significantly lower incidence of invasive cancer of any type or a composite of major cardiovascular events (myocardial infarction, stroke, and death from cardiovascular causes) than placebo. The intervention also did not lead to a lower incidence of total deaths from cancer or a lower incidence of breast, prostate, or colorectal cancer than placebo."
Our Take
![](https://www.clearvuehealth.com/assets/15912228081583391.png)
Key Takeaways
Blood levels of Vitamin D have consistently shown a correlation with a lower risk of developing cancer. However, clinical trials show that taking supplements may not reduce your risk of developing cancer. This suggests that the benefits of vitamin D cannot be obtained by taking supplements. Rather, vitamin D levels may be an indicator of a healthy lifestyle. As always, diet and exercise are a safe bet.
Background
![Chart of how vitamin D is made](https://www.clearvuehealth.com/images/vitamind-synthesis.jpg)
How Vitamin D is Made: Skin cells are believed to create 7-Dehydrocholesterol. UVB Rays from the sun convert this to Vitamin D3. Your liver and kidneys convert this to active Vitamin D. Vitamin D is then distributed throughout the body.
More Information
![](https://www.clearvuehealth.com/images/prize.png)
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