d.velop stronger immunity*
3x faster, 3x more effective.*†
The best source of Vitamin D under the sun
Understand and optimize your immune health
Maximize your immunity
d.velop™ products are the only vitamin D supplements with calcifediol, a clinically proven form of vitamin D that raises vitamin D levels 3x faster than other supplements.*†
The test kit
The d.velop™ vitamin D test kit, available for free with a three-month subscription (a $70 value), will help you first understand your current vitamin D deficit, and then track your progress as you reach recommended levels — which can happen in as few as 14 days.
At your fingertips
Track your progress toward a healthier immune system and improved vitamin D levels with the d.velop™ app. Simple, straight-forward support from registered dietitians designed to help you reach your goals.
See what others are saying.
“After taking the test and finding out I was Vitamin D deficient, I started taking d.velop supplements. My vitamin D. levels had risen within only two weeks.”
“Taking my d.velop has made me more energetic and feeling better.”
“This is an amazing at-home test and perfect for anyone wanting to boost their vitamin D levels within a month.”
“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.”
“Great for building a resilient and strong immune system quickly!!”
"…my level went from 17.9 to 35 in 2 weeks! "
“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.”
Certified Dietitian Nutritionist
Melissa Rifkin, MS, RD, CDN
“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
“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.”
Chloe Giraldi, MS, RD, LDN