THORNE Vitamin D3 Liquid, 4,000 IU with Precision Dropper, 30 Servings

Product description

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Customer Reviews

4.6 out of 5 stars 106

4.3 out of 5 stars 7,607

4.7 out of 5 stars 17,980

4.7 out of 5 stars 3,482

4.6 out of 5 stars 3,238

4.4 out of 5 stars 6,554

4.3 out of 5 stars 2,624

Price

$24.00$24.00

$36.00$36.00

$44.00$44.00

$26.00$26.00

$41.00$41.00

$44.00$44.00

$52.00$52.00

Servings

30

30

90

90

90

30

60

Primary Benefits

Immune Support

Foundational Support

Sports Performance

Muscle & Sleep Support

Heart & Brain Health

Heart & Gut Health

Muscle & Sleep Support

Key Ingredients

Medium Chain Triglyceride

Vitamin B, Magnesium

Creatine Monohydrate

Magnesium Glycinate

Omega-3 Fatty Acids

Berberine Phytosome

Magnesium

Gluten & Dairy Free

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Trusted by 45K+ Health Pros

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3rd Party Certified

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Is Vitamin D3 right for me?

Thorne Vitamin D3 supports strong bones, cardiovascular health, immune function, muscle strength, and a positive mood.* It’s ideal for those looking for a vegan and easy-to-dose liquid form of vitamin D.

What testing does Thorne complete for Vitamin D3?

We test this supplement for identity, purity, and potency to meet our strict quality standards. The NSF Contents Certified mark indicates that it has been third-party tested according to strict standards for quality, safety, and label claims.

What is vitamin D3?

Vitamin D3 (cholecalciferol) is the same form of vitamin D your body naturally produces when your skin is exposed to sunlight. Vitamin D3 is considered the preferred form for maintaining healthy vitamin D levels.*

Why is vitamin D3 considered the preferred form?

Vitamin D3 is the preferred form of vitamin D because research shows it is more effective at raising and maintaining healthy vitamin D levels in the blood than vitamin D2.*

Should vitamin D3 be taken with vitamin K2?

Vitamin D3 and vitamin K2 work synergistically in the body. For individuals supplementing with vitamin D, adding vitamin K2 can provide complementary support for bone and cardiovascular health.*

Product Dimensions ‏ : ‎ 1.25 x 1.25 x 2 inches; 2.89 ounces
Item model number ‏ : ‎ D178
Date First Available ‏ : ‎ January 13, 2026
Manufacturer ‏ : ‎ Thorne Research
ASIN ‏ : ‎ B0G2YVCF5Q
Best Sellers Rank: #20,585 in Health & Household (See Top 100 in Health & Household) #122 in Vitamin D Supplements
Customer Reviews: 4.6 4.6 out of 5 stars (106) var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
Vegan Vitamin D: Sustainably sourced plant-based vitamin D3 that supports healthy teeth and bones by enhancing the absorption of calcium; supports immune function and cardiovascular health*
Optimal Absorption: Vitamin D3 (as cholecalciferol) is more potent and better absorbed than vitamin D2 (or ergocalciferol); research shows vitamin D3 is more effective at raising overall vitamin D levels*
Easy to Take: The liquid form with a bulb-dropper top measures doses of both 2,000 and 4,000 IUs of vitamin D that can be mixed with food or beverages, empowering customizable supplementation
4 Rounds of Testing: Our state-of-the-art laboratories enable us to conduct 4 rounds of testing on every product, from analyzing the purity of raw materials to confirming the shelf life of finished formulas
Trusted: Thorne is trusted by 100+ professional sports teams and the #1 most recommended clinical brand by consumers and health-care practitioners (Based on a 2026 independent survey of US supplement consumers and health-care practitioners)