Raise your vitamin D levels.†
Up your immune defense.*

Guaranteed to raise low vitamin D levels in as few as 14 days*†

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I went to a baseball game for the first time after the pandemic due to d.velop. I would not have gone if not for d.velop.

James J

d.velop™ ImmunityPlus

With additional immune support*

Exclusive d.velop™ vitamin D that's 3x faster and more effective*†

Vitamin C to combat oxidative stress

Zinc to help immune cells communicate

Free test kit with subscription

App tracks and educates on key areas of immune health


How d.velop is different



Boost your vitamin D levels in as little as 14 days*†

Others Can take months to raise vitamin D levels.


d.velop™ is the only supplement that delivers calcifediol, the same form of vitamin D that circulates naturally in your blood.

Others Include conventional forms of vitamin D that need to be broken down by the liver.


A test kit lets you measure your vitamin D baseline and track your progress.

Others Don't test vitamin D levels or educate on proper supplementation.


Reaching and maintaining vitamin D levels in an optimal range supports immunity.

Others You pay for months of supplements without knowing if you are getting the amount of vitamin D to meet you needs or benefit your health.

Chief Science Officer

Nate Matusheski, PhD oversees the identification of high quality diagnostics, development of nutritional products, and algorithms to drive success. A veteran industry scientist with a PhD in human nutrition, Nate has authored numerous research publications and holds several international patents.

Our Science

Why experts go with d.velop

“Vitamin D is a foundational immune system nutrient. It’s important that we assess our supplemental needs as we look to stay healthy year round.”

Registered Dietitian,
Chloe Giraldi, MS, RD, LDN

“More than 9 in 10 people don't get enough vitamin D from food alone. That's why we created the most effective vitamin D available as a supplement.”

Chief Science Officer,
Nate Matusheski PhD

"With so much misinformation out there, especially online, I think it's invaluable that users have access to an RD to help navigate how to improve their immune health in a way that is tailored specifically to them."

Registered Dietitian,
Laura Ward, MS, RDN, LDN, IBCLC

Ask us anything

We recommend that you take d.velop™ on a daily basis, alongside food. You might find taking d.velop at the same time each day helps you get in the habit. Remember, dietary supplements are not intended to replace a healthy diet, but they can help support one!
Clinical studies have shown that ampli-D® can achieve optimal vitamin D status (30ng/mL), on average 3X faster, and is 3X more effective compared to the same mcg dose of traditional vitamin D3.
d.velop™ products are as safe as other vitamin D products for pregnant and lactating women. However, we recommend that you consult with your doctor before using or continuing to use d.velop™ and any other dietary supplement if you are nursing, pregnant, trying to conceive, or taking medication.