Discover a better vitamin D
Only d.velop is made with calcifediol, the form of D your body produces naturally.*
What's the difference?
3x more effective*†
Personalized app support
How d.velop is different
Works in as little as 14 days to boost vitamin D levels*
Can take up to 60 days or more to boost vitamin D levels
Made with calcifediol, the easily absorbed form of D your body makes on its own*
Made with the conventional form of D that can’t be absorbed until it's processed by your liver
Subscription includes easy, accurate home tests that show how your levels improve
No way to know if your supplement is working without expensive lab work
Starts working fast, so you get the most boost for your buck
May have to buy several bottles before seeing any improvement
Supercharged and feeling good
Immunity is more important than ever, especially as we continue to support our health through the COVID-19 pandemic..supplemental nutrition is a big part of this equation
Taking my d.velop has made me more energetic and feeling better
The directions were easy to follow and the test kit worked better than I would have expected.
Meet your unique needs
Everybody is different. Check your vitamin D levels with our easy home test kits, and download the app for comprehensive health advice designed just for you.
Vitamin D levels drop during the fall, while the risk for colds and flu goes up. It's not just a coincidence. That's why we created the most effective vitamin D available as a supplement†. - Nate Matusheski PhD, Chief Science Officer
3x more effective than other vitamin D supplements*†
It’s true: d.velop is the only supplement made with calcifediol. Clinical studies show that this form of D—which is the same form your body makes on its own—is more effective and more easily absorbed.*† Learn more about the science behind d.velop.