THORNE – Vitamin D3 with a Metered Dispenser – Liquid Vitamin D Vegan Supplement – Supports Healthy Bones, Teeth & Muscles, Plus Cardiovascular & Immune Function* – 4,000 IU – 1 Fl Oz – 30 Servings

Product description

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Customer Reviews

4.4 out of 5 stars 60

4.3 out of 5 stars 7,249

4.7 out of 5 stars 16,673

4.7 out of 5 stars 2,383

4.6 out of 5 stars 3,079

4.4 out of 5 stars 6,333

4.4 out of 5 stars 2,491

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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What makes Thorne supplements high quality?

Thorne produces high-quality supplements through rigorous testing, well-researched ingredient sourcing, and strict manufacturing standards. We avoid unnecessary additives, binders, and fillers that may interfere with nutrient absorption.

How does Thorne test its supplements for quality?

To confirm the purity of our ingredients, the potency of our formulas, and the absence of all contaminants, we carry out a minimum of four rounds of testing on every product we manufacture. 100+ Thorne employees are dedicated to ensuring quality.

Are Thorne supplements clinically tested and safe?

Thorne partners with researchers and conducts clinical trials to support the efficacy of our products. Our team of doctors and medical experts substantiate each ingredient in every formula based on extensive clinical research and medical literature.

Why are Thorne products more expensive than other supplements?

When it comes to the health of our customers, we never settle. Thorne products may be priced higher than some others because of our commitment to quality at every step. We don’t simply meet the standard in dietary supplements — we set the standard.

Where are Thorne supplements made and where are the ingredients sourced from?

Located in South Carolina, Thorne manufactures supplements in the USA using globally sourced ingredients. When it comes to ingredient sourcing, we seek out only the highest-quality ingredients, selecting each one for its purity and effectiveness.

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: #22,083 in Health & Household (See Top 100 in Health & Household) #132 in Vitamin D Supplements
Customer Reviews: 4.4 4.4 out of 5 stars (60) 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)