D3 Serum 0.43 fl oz

★★★★★ 4.9 · 18 verified reviews

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.

5,000 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*

  • Clinically-dosed, bioavailable actives*
  • Supports energy, focus & balance*
  • No fillers, dyes, or junk*
  • Practitioner-grade quality*

Choose your plan

✓ In stock — ships today Free shipping over $75 30-day guarantee

3rd-Party Lab Tested

Practitioner-Grade

Non-GMO

cGMP Certified

Who it's for

  • Anyone wanting to feel their best*
  • People tired of guessing what to take*
  • Those who value tested, clean formulas*

How to use

Take 2 capsules daily, or as directed by your healthcare practitioner. Best taken with a meal for optimal absorption.

These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.

Details & FAQ

How long until I notice results?
Most people notice a difference within 2–4 weeks of consistent daily use. For best results, take as directed every day.
Is this third-party tested?
Yes. Every batch is tested by independent labs for purity, potency, and safety.
Can I cancel my subscription anytime?
Absolutely. Skip, pause, or cancel anytime from your account — no fees, no hassle.
Do you offer a guarantee?
Yes — try it risk-free for 30 days. If you're not satisfied, we'll refund you.

Not sure if this is right for you?

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* These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Individual results may vary. Customer reviews reflect individual experiences and are not a guarantee of results. Always consult your healthcare practitioner before starting any supplement — especially if you are pregnant, nursing, taking medication, or managing a health condition.

$17.05 Monthly