Most people think vitamin D is only for bones.
But for decades, scientists have been studying something much bigger:
The link between vitamin D and cancer.
And what they’ve found is surprising.
While vitamin D is not a cure and not a treatment, study after study shows that people with healthy vitamin D levels often have better cancer outcomes than those who are low.
Here are 6 major studies that changed how researchers think about vitamin D.
Study #1 — The VITAL Trial (over 25,000 people)
This was one of the largest vitamin D studies ever done.
Researchers followed more than 25,000 adults who took either vitamin D or a placebo.
They found something interesting:
Vitamin D didn’t greatly reduce how many people got cancer…
But the people taking vitamin D had fewer deaths from cancer over time.
Simple takeaway: Vitamin D may help improve outcomes if cancer occurs. [1]
Study #2 — A Meta-Analysis of Many Trials
Scientists combined the results from multiple vitamin D studies.
When they looked at all the data together, they saw a clear pattern:
People who took vitamin D had lower cancer mortality.
Takeaway: Across many studies, vitamin D is linked with fewer deaths from cancer. [2]
Study #3 — A 2024 Umbrella Review
This large review looked at dozens of studies all at once.
The conclusion?
There is consistent evidence that vitamin D supports better cancer outcomes, especially in cancers like colorectal cancer.
Takeaway: The pattern keeps showing up across research. [3]
Study #4 — How Vitamin D Affects Cells
Scientists don’t just look at outcomes. They also study how things work in the body.
They found vitamin D helps:
- Regulate the immune system
- Control inflammation
- Guide how cells grow and divide
- Support healthy cell life cycles
These are all processes that matter when it comes to cancer.
Takeaway: Researchers understand how vitamin D could influence cancer behavior at the cellular level. [4]
Study #5 — Genetic Studies (Mendelian Randomization)
This type of study removes lifestyle factors and looks only at genetics.
Even here, researchers still found links between low vitamin D levels and higher cancer risk.
Takeaway: This may be more than coincidence. [5]
Study #6 — Colorectal Cancer Survival Study (2024)
In this recent study, researchers looked at people with colorectal cancer.
Those with higher vitamin D levels had better survival rates.
Takeaway: Real patient outcomes are linked to vitamin D status. [6]
What All 6 Studies Have In Common
These studies don’t say vitamin D prevents cancer.
But they do show something important:
People with healthy vitamin D levels often have better outcomes, better survival, and healthier cell function.
That’s a connection too strong to ignore.
The Absorption Problem Nobody Talks About
Here’s something most people don’t realize:
Vitamin D is fat-soluble.
That means many capsules, tablets, and softgels are poorly absorbed.
A large portion of what you take can pass through your system unused.
This is why many people supplement with vitamin D and STILL show low levels on blood work.
Why Purality Health Uses Micelle Liposomal Vitamin D3/K2
At Purality Health, we focus on one thing:
Not how much vitamin D you take…
But how much your body can actually use.
Our Micelle Liposomal Vitamin D3/K2 is designed to protect these nutrients through digestion and help them absorb directly into your bloodstream.
And we include vitamin K2 because it works hand-in-hand with D3 to support proper calcium use in the body.
What Customers Who Track Their Levels Say
Don’t just take our word for it. Here’s what Purality Health customers who regularly check their vitamin D levels through blood work have shared:
Bo recently wrote us and said:
“This is my go-to product: high quality and effective. I have blood/lab work done semi-annually, and always have my vitamin D levels noted. They are consistently in the mid 30s, which is my goal. Living in MN, it takes a good supplemental source to achieve this. I am a happy customer, and appreciate the great personal contact with support people. Great service and product, thank you.”
Kathleen said:
“I love the taste of the D3/K2 and recent blood work I had shows my vitamin D levels are at a perfect level.”
Eunice left a review saying:
“I had tried so many different vitamin D3 with K2 supplements without ever seeing my vitamin D level rise to the standard range in blood tests until I started using Purality’s D3 with K2 seven months ago. I supposed the difference lay in the liposomal feature that helped with my absorption. Plus this liquid vitamin tastes like quality olive oil and the pumping worked much more convenient than the traditional way of a dropper. I actually recommended it to my sister who immediately purchased 6 bottles.”
Lynn shared this with us:
“Great product. I’ve been using it for 5 years now. Both D3 & K2 are essential for great health. I’m 72 and every time I get blood work done for my annual physical, the doctor says, ‘Whatever you’re doing, keep doing it!’”
Linda said:
“I have used other D3 supplements but my blood work numbers would still be low. After ordering the liposomal liquid D3 with K2 my next blood work numbers increased and for the next 1 year and a half they maintained the normal range. It’s the best product.”
Russ also told us:
“It’s nice on the taste buds and easily absorbed no matter when you take it. It helps me maintain adequate D levels when I get blood work.”
The Bottom Line
The research on vitamin D and cancer is too strong to ignore.
And if you’re going to supplement…
Make sure your body can actually absorb it.
Because that’s where the real difference is.
