Premier Research Labs Vitamin D3 Serum | Radiant Life

Vitamin D3 Serum

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Key Features

  • 1,000 IU vitamin D3 per dose
  • Natural source vitamin D3 (not synthetic)
  • In a fat-soluble base (extra virgin olive oil) for better absorption
  • No added magnesium stearate
  • No artificial colors or flavors
  • Promotes bone growth and mineralization
  • Promotes absorption of calcium
  • Supports cardiovascular health
  • Supports immune system health 

1000 IUs in just one drop!

Introducing Premier Research Labs' D3 Serum. D3 Serum offers 5,000 IU per serving of natural-source Vitamin D3 as a fat-soluble liquid in a base of extra virgin olive oil. No artificial flavors or colorings, no added magnesium stearate or other undesirable chemical agents.


Do you think about vitamin D when you’re catching up on the sun’s rays outside? New, exciting research shows that this little powerhouse vitamin has many newly discovered functions. Of course, maintaining healthy vitamin D levels is essential throughout all stages of your life. But did you know that vitamin D receptors are found in countless tissues throughout the entire body? That can only mean that vitamin D has a much greater impact on the body’s health than we previously thought.


We already knew that vitamin D was very important in helping to maintain healthy bones, bone growth, bone mineralization and absorption of calcium. Vitamin D also supports cardiovascular system health. But now, eye-opening research shows that our immune cells have vitamin D receptors. What? Immune cells with vitamin D receptors? Yes! This means that getting enough vitamin D may be critically important to support our immune system health by helping to activate immune cells.


The body’s need for adequate vitamin D has gathered even more attention lately. Although direct sunlight exposure on the skin initiates an excellent source of vitamin D, many people simply can’t achieve the vitamin D levels they need for their best health. Maybe they simply don’t receive enough sunlight or it’s tough for them to convert vitamin D to the active form. Either way, taking a high quality vitamin D supplement makes good sense for supporting optimal health.


First, the preferred form of vitamin D is D3 (not vitamin D2) because it is better metabolized by the body. Second, look for a natural source of vitamin D3 (not synthetic) with at least 5,000 IU per dose. Avoid products with undesirable chemical tagalongs such as magnesium stearate (a questionable excipient) or other chemical no-no’s.

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: 5 Drop (0.011 mL)

Serving Per Container: about 114

  Amount Per Serving % Daily Value
Vitamin D3 125 mcg (5000 IU) 625%

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.

13 Reviews

  • Great product

    Jan 24th 2023 | By Toni


    I used to be deficient in D. My doctor put me on 5000 IUs a day. Sice taking this product it has not happened again.

  • Great product, fast shipping

    Apr 5th 2022 | By Adrian


    Thank you for offering parcel rates for lighter orders if applicable so we are not stuck with limited shipping options. Thank you for fast shipping and fast processing of orders.

  • Excellent product

    Feb 11th 2022 | By Toni


    Excellent product. I've been using it for about 2 years. Just had blood work & it's perfect!

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