Vitamin D3 Serum

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1000 IUs in just one drop! Your reliable rich, live source for the purest natural Vitamin D3. A single drop contains 1000 IU!

1000 IUs in just one drop!

Your reliable rich, live source for the purest natural Vitamin D3. A single drop of Premier Research Lab’s Vitamin D3 serum contains 1000 IU!

Vitamin D is one of the few nutrients the body needs that does not come from a wide variety of foods. Although salmon, mackerel, sardines and tuna can deliver about 200 IUs/serving, they are not an adequate source of D3. After fortification, milk delivers only vitamin D2 - not D3, the real thing. Vitamin D2 is also added to fortified dairy products but does not function in the same way as D3. Vitamin D3 can be more than 3 times as effective as D2 in maintaining and raising vitamin D blood levels. Although vitamin D3 is more expensive to produce, it is clearly superior to D2. That is why we only use D3 in our D3 Serum.

The body was designed to manufacture a sufficient amount of vitamin D simply by skin exposure to sunlight, which converts 7-dehydrocholesterol to cholecalciferol. Cholecalciferol in turn is hydroxylated at the liver forming 25(OH) D. At the kidneys, 25(OH)D is metabolized to the most active form of vitamin D 1,25(OH)2D3. Sadly, we as a nation do not spend much time in sunlight and when we do, our skin is mostly covered. As a consequence, most people have low levels of vitamin D3, which has initiated a ground swell of scientific research calling for increased daily vitamin D3 intake for all Americans.

This is your natural source of vitamin D3! D3 Serum, by Premier Research Labs is your reliable source for the healthiest, natural vitamin D3. No solvents have been used that may impair the D3 Serum biofield and compromise the long-term benefits of this live-source vitamin D3.

Key Benefits of Live-Source Vitamin D3

Immunity: Population groups with greater direct sunlight exposure or more vitamin D3 exposure, were found to have stronger immune function than those with restricted sunlight exposure.* Vitamin D3 receptors are known to exist on most immune cells and play a role in maintaining healthy immune cell maturity, differentiation and integration.

Breast and Mucosal Organs: Research indicates optimal serum levels of vitamin D3 may be important in maintaining the best health of the cells of the breasts, lungs, colon, esophagus, stomach, pancreas, bladder, prostate, uterus, ovaries and kidneys.

Bone Health: In a 3-year randomized controlled study, vitamin D3 and calcium supplementation promoted bone strength and reduced risk of falling in women aged 65 or older. Vitamin D3 supplements were shown to support hip and non-vertabral bone health in a meta-analysis of twelve double-blind randomized controlled trials of 20,000 people. Vitamin D is essential for healthy calcium metabolism; it promotes intestinal calcium and phosphorus uptake and can reduce urinary calcium excretion.

Nerve Function: Research indicates vitamin D may promote neural health by supporting healthy nerve conduction potential, antioxidant defense and neuronal calcium regulation. High circulating blood levels of end-chain vitamin D3, 25- hydroxyvitamin D, were associated with nerve and myelin health in a study of 7 million U.S. military personnel, published in JANA, 2006.

Cognition: Higher levels of vitamin D were correlated with healthy mood and mental function in two studies of more than 300 elderly people. Additionally, we now know that vitamin D receptors and vitamin D hydroxylation pathways exist in areas of the brain responsible for memory and cognition.

Heart Health: Healthy blood vessel relaxation and blood flow are associated with ideal levels of vitamin D3. Healthy inflammatory response, antioxidant defense and cytokine production are associated with optimal blood levels of vitamin D as well.

Radiant Life is licensed to distribute nutritional supplements, foods andwellness products manufactured by Premier Research Labs, Austin, Texas,USA.


Disclaimer: The information provided here is meant to serve as an educational resource for determining your options and making your own informed choices. It is not intended as medical advice or to diagnose, prescribe, or treat any specific illness. The statements made on this website have not been evaluated by the FDA.

Supplement Facts

Serving Size: 1 Drop (0.022 mL)

Serving Per Container: about 572

  Amount Per Serving % Daily Value
Vitamin D3 25 mcg (1000 IU) 125%

Other Ingredients: Extra Virgin Olive Oil, D-Alpha Tocopherol

Recommended Use: Take one drop daily or as directed.

  • Vitamin D3 aids in calcium absorption for healthy bones and teeth; it also delivers cardiovascular and immune system support.**
  • Studies propose ideal vitamin D3 intake should be 2000 IU daily or more.

Tests on to all 4 biofield polarities, thus delivering the "Premier Nutrition Effect"ª

Not intended for infants. Keep out of reach of children.

Frequently Asked Questions

Q. What is the source of the Vitamin D?

A. Vitamin D is extracted from sheeps wool without the use of toxic solvents or heat.

Q. What is the source of the Vitamin E (D-Alpha Tocopherol) and why is it added?

A. D-Alpha Tocopherol is sourced from non-gmo soy that goes through a multi-step process so it does not contain any soy allergen or protein. It is added in tiny amounts to prevent the rancidification of the olive oil base.

Q. Where is the olive oil in the product from?

A. The extra virgin olive oil is the manufacturer's own brand and is made from Moroccan olives.

7 Reviews

  • Great so far

    Jan 18th 2022 | By Heidi


    I've been taking this for a few months and really like it! It's easy to take since it just takes like olive oil. I'm pregnant and taking 3 drops a day. I'm giving our 2 year old a drop a day. She enjoys taking it with me! Our family had COVID a few months ago (fortunately shortly after this arrived) and I was taking 10 drops a day throughout that.

  • PRL Vitamin D3 Serum

    Oct 5th 2021 | By Laura


    This D3 is the best. Was told my D level was really low at 18. Took this for a few months and tested again . was told by my Dr that whatever I was taking was working so well that my level was now to high. I cut back and now it stays perfect. Don't want to be without it.

  • I like the fact that the D3 is in liquid form. It's great!

    Aug 31st 2021 | By Debbie Sadowski


    I was looking for a liquid form of D3 and finally found it on Radiant Life.

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