Your questions, expert answers

d.velop™ products are marketed in compliance with all appropriate US Food and Drug Administration (FDA) regulations. All of our products are produced under FDA Good Manufacturing Practices (GMPs) and are third-party tested. 

At this time we currently ship anywhere in the United States. 

You can change your shipping address, pause or cancel subscription shipping options in the profile that you create upon checkout on: https://dvelopimmunity.com

d.velop™ products are the only vitamin D supplements available that contain vitamin D in the form of calcifediol. Clinical studies have shown that ampli-DTM calcifediol can achieve optimal vitamin D status (30 ng/mL), faster, and more effectively compared to the same microgram (mcg) dose of traditional vitamin D3.1 

d.velop™ products are currently manufactured in Europe.

All of our products are produced under FDA Good Manufacturing Practices (GMPs) and are third-party tested. 

Most Americans don’t consume enough vitamin D from foods alone, and overall there are few food sources naturally rich in vitamin D. A majority of our Vitamin D can also come from sunlight absorbed by our skin when we are exposed to the sun. Getting enough sun can be a challenge based on where we live, as well as during the winter months. When the sun shines, we also tend to protect ourselves with clothes and sunscreen. 

In most populations insufficient vitamin D status is a major public health issue; 88% of individuals worldwide are insufficient2. Only about 10% of vitamin D comes from the diet, the remaining majority, 90% is obtained from the sun3. 

The following groups are especially at risk of vitamin D insufficiency or deficiency: 

• People who are housebound  
• Community-dwelling people who are older, or have disabilities
• People in residential care
• People with darker skin tones
• People who regularly avoid sun exposure or work indoors
• People who live in northern latitudes, and during the wintertime.

We think of vitamin D as the “Goldilocks” vitamin - we want to aim for vitamin D levels that are, “not too high, and not too low, we want them to be just right.” 

The target range of optimal vitamin D levels that we aim for is 30-60 ng/mL. Levels below 30 ng/mL have been associated with decreased immune system function. Going above 60 ng/mL has not been associated with any additional benefit. We've based this off of multiple studies on vitamin D levels for optimal health outcomes4,5,6,7. 

Because vitamin D is a fat soluble vitamin, it can build up in your system. Therefore, it is important to consume an amount that will result in an optimal vitamin D level, not more, and not less.

Vitamin D can be found naturally in oily fish (such as salmon, mackerel, sardines and herring), egg yolks, dairy products, beef liver, and mushrooms. In the United States, some foods are fortified with vitamin D, such as dairy products, orange juice, soy milk and cereals. Fortification means that vitamin D has been added. We rely on fortified foods and supplements to help us meet our daily needs because there are a limited number of foods that are naturally rich in vitamin D8.  

It’s all about the absorption efficiency here. Everyone absorbs and converts vitamin D3 to calcifediol differently. With traditional vitamin D3 it can take months to reach optimal levels of vitamin D in the body. Calcifediol has superior bioavailability, therefore you are more likely to reach sufficient vitamin D levels in days compared to the months it may take with ordinary vitamin D3 supplements.

For example, in a recent clinical study, it was found that a 20 mcg dose of calcifediol took 4 weeks to reach a sufficient level in the blood (30 ng/mL), whereas a 60 mcg dose of regular vitamin D3 didn’t reach a sufficient level by the end of the study (16 weeks).

Some studies suggest that vitamin K2 along with vitamin D3 (cholecalciferol) may contribute to bone and immune health10, 11, however, research continues to emerge in this area. We advise you check with your healthcare provider to see what would be appropriate for your health goals. 

If you are currently taking vitamin D, or a supplement containing vitamin D we recommend that you check the amount of vitamin D in those supplements if you are planning to take them while taking d.velop™ vitamin D, d.velop™ ImmunityPlus, or d.velop™ Kids gummies.

We recommend that you consult with a healthcare professional before starting any dietary supplement products. The current recommended upper limit (UL) for vitamin D intake is 3000 IU for children aged 4-8, and 4000 IU for adults and children aged 9-1812. Registered Dietitians in the d.velop™ app are happy to answer any questions about your current routine or the d.velop™ products. If you are unsure, it is always a good idea to check your vitamin D levels with our d.velop™ vitamin D test.  

You can take d.velop™ vitamin D products at any time of day. We recommend that you take d.velop™ on a daily basis, alongside food. 

d.velop™ provides an amount of vitamin D that has been shown to promote optimal vitamin D levels when taken as recommended. It takes several weeks, rather than months, of daily calcifediol intake to reach a new steady state level This level will decrease to a lower level again if daily supplementation is stopped. 

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. 

Side effects are unlikely for vitamin D supplements when taken as recommended. Consult your doctor if you do experience any symptoms. 

No, d.velop™ vitamin D products are not currently considered to be vegan. 

The “blood” level of vitamin D that is presented in your test is equal to the concentration of total vitamin D level in plasma or serum. It is measured from a dried blood spot using an LC/MS method, which is a gold standard technique. This method of measuring plasma vitamin D levels from a dried blood spot has been validated against levels in liquid plasma.

The d.velop™ vitamin D test can be a way to see improvements in your vitamin D levels over time using supplementation with d.velop™ vitamin D. However, it is not a diagnostic device and is for informational purposes only. If you have a concern about your vitamin D levels, we recommend that you consult with your doctor.  

Your lab measurements could differ from your current d.velop™ vitamin D test results for many reasons including the timing and season that you were initially tested, differences in sun exposure, and even changes in dietary intake of vitamin D (food and supplements) between when you were last tested and now.

You may take your vitamin D test any time. Fasting is not necessary to take the vitamin D test.

Yes! Even if you live in sunnier climates and/or take vitamin D, you still might be falling short. There are many individual factors that can impact your blood level of vitamin D. The only way to truly know if your diet, supplements or environment is delivering what you need is to take a vitamin D test such as the d.velop™ vitamin D test. Our vitamin D test is offered along with the 3-month subscription options, or can be purchased on its own.

Your vitamin D test results will be available in the d.velop™ app! Click here to download the app where you can access and understand your vitamin D blood test results as well as receive personalized support from Registered Dietitians around nutrition and lifestyle for optimal immune health: https://dvelopimmunity.com/products/the-app

The vitamin D test results should arrive in the d.velop™ app about 5 days after the test is received by the lab.

You can give your child their d.velop™ Kids gummies at any time of day. We recommend that you give them d.velop™ Kids gummies on a daily basis, with a meal in order to help with digestion and absorption of the nutrients. Make sure that your kiddos chew thoroughly.  

d.velop™ Kids gummies are appropriate for ages four and over. The American Academy of Pediatrics recommends that children over 1 year of age, and adolescents get 600 IU of vitamin D daily13, the amount you’ll find in d.velop™ Kids!

How can I make sure my child is getting enough vitamin D? 

Sunlight, food and supplements are the main ways to make sure your child is getting enough vitamin D.  

• Kids will absorb vitamin D from the sun outdoors. However, depending on where you live, or the amount of time spent outside, this may not be enough – especially in the winter months! It’s always important to keep skin protected from excess sun exposure using sunscreen as well.  
• If your kiddo has started eating solid foods, you can introduce foods like salmon, light canned tuna, eggs, fortified foods such as cereals and orange juice, or fortified dairy products like cow’s milk or yogurts. There aren’t many foods that are naturally high in vitamin D so it can be challenging to get vitamin D from foods alone.  
• Supplements can help provide vitamin D if your child is a selective eater (doesn’t eat many of the foods above, or eats them in very small amounts), or if you live in an area north of the line on this map.

Sunlight, food and supplements are the main ways to make sure your child is getting enough vitamin D.

• Kids will absorb vitamin D from the sun outdoors. However, depending on where you live, or the amount of time spent outside, this may not be enough – especially in the winter months! It’s always important to keep skin protected from excess sun exposure using sunscreen as well.  
• If your kiddo has started eating solid foods, you can introduce foods like salmon, light canned tuna, eggs, fortified foods such as cereals and orange juice, or fortified dairy products like cow’s milk or yogurts. There aren’t many foods that are naturally high in vitamin D so it can be challenging to get vitamin D from foods alone.  
• Supplements can help provide vitamin D if your child is a selective eater (doesn’t eat many of the foods above, or eats them in very small amounts), or if you live in an area north of the line on this map

No. Our d.velop™ Kids gummies are free from high fructose corn syrup, synthetic (FD&C) dyes, artificial flavors, artificial  

sweeteners, and lactose.  

No allergen ingredients are used in the manufacturing of d.velop™ Kids gummies. However, this product is processed in a facility with products that contain wheat, soybeans and eggs. 

If your child has a severe or life-threatening allergy, we recommend that you speak with your doctor prior to using any d.velop™ product. 

d.velop™ Kids gummies get their color naturally using carrot juice concentrate. Pretty cool, right??

Yes, d.velop™ Kids gummies are appropriate for ages four and over, and even adults. The American Academy of Pediatrics recommends adolescents get 600 IU of vitamin D daily13, the amount you’ll find in d.velop™ Kids!

You can take d.velop™ ImmunityPlus any time of day. We recommend that you take d.velop™ ImmunityPlus on a daily basis, with a meal in order to help with digestion and absorption of the nutrients.  

Vitamin D is essential when it comes to keeping your body’s defenses up and helping your immune system work at its best.* Only d.velop™ contains ampli-DTM  calcifediol, which is a form of vitamin D3 that helps you achieve optimal vitamin D levels an average of 3X faster and 3X more effectively than conventional vitamin D.*† d.velop™ ImmunityPlus is enhanced with key essential nutrients to fortify your body’s natural defenses.* Vitamin C works to support the body’s antioxidant defenses, while vitamin D and zinc work at the cellular level to help optimize immune system function.1,9

d.velop™ ImmunityPlus is appropriate for adults, aged 18 years of age and older.  

No allergen ingredients are used in the manufacture of d.velop™ ImmunityPlus. However, this product is processed in a facility with products that contain milk, eggs, fish, crustacean shellfish, tree nuts, peanuts, wheat and soybeans. 

If you have a severe or life-threatening allergy, we recommend that you speak with your doctor prior to using any d.velop™ product 

At this time, d.velop™ vitamin D is not Kosher.

At this time, d.velop™ vitamin D is not Halal.

No, we advise that you do not exceed the recommended two tablet dose of d.velop™ daily. If you are concerned about your vitamin D intake, we recommend that you test your vitamin D levels and speak with your doctor. Our Registered Dietitians will also be able to answer your questions about appropriate vitamin D levels.

No allergen ingredients are used in the manufacturing of d.velop™ vitamin D. 

If you have a severe or life-threatening allergy, we recommend that you speak with your doctor prior to using any d.velop™ product.