THORNE Vitamin D3 Supplement 1,000 IU, 180 Capsules — Daily Maintenance for Bone Strength

THORNE Vitamin D-1,000 is a daily vitamin D3 supplement delivering 1,000 IU per capsule to support normal bone strength, calcium use, and general wellbeing for those with limited sun exposure.

Many people do not get consistent sun exposure year-round, and dietary sources of vitamin D can be limited. This THORNE formula provides cholecalciferol (vitamin D3), the form of vitamin D that research shows raises and maintains circulating vitamin D levels more effectively than vitamin D2. Each bottle contains 180 easy-to-swallow capsules, making it a convenient option for daily maintenance or for stacking within a broader supplement plan.

How does THORNE Vitamin D-1,000 help maintain healthy bones and teeth?

Vitamin D plays a role in supporting the body’s ability to use dietary calcium and phosphorus, nutrients essential for bone and dental structure. Taking an appropriate supplemental dose can help ensure consistent intake when sunlight or dietary sources are inadequate.

• Contains vitamin D3 (cholecalciferol), the widely studied form for sustaining vitamin D status.
• 1,000 IU per capsule—an everyday maintenance dose for many adults.
• 180 capsules provide a long supply for regular use.

Is vitamin D3 better absorbed than other forms?

Cholecalciferol (D3) is generally considered more efficient at raising blood vitamin D levels than ergocalciferol (D2). THORNE uses D3 to support predictable increases in vitamin D status when taken consistently.

• Formulated with vitamin D3 for superior potency compared with D2.
• Designed for daily dosing to build and maintain levels over time.
• Suitable for combining with other nutrients in a personalized supplement routine.

What quality checks and certifications does this product have?

THORNE emphasizes product integrity through third-party testing to confirm ingredient identity and to screen for contaminants. These measures aim to ensure the capsules contain what’s listed on the label without unacceptable levels of impurities.

• Third-party tested to verify label accuracy and purity.
• Manufactured by a brand recommended by many practitioners and used by professional teams.
• Produced under quality systems that meet industry standards for supplements.

How should I use these capsules and who should consider them?

One capsule provides 1,000 IU of vitamin D3; follow label directions or a healthcare professional’s guidance for dosing. People with limited sun exposure, those living at higher latitudes, or anyone wanting to maintain consistent daily intake of vitamin D may find this product useful.

• Convenient daily capsule format—easy to add to a morning routine.
• 180-capsule bottle gives an extended supply for regular supplementation.
• Can be used alongside other THORNE supplements as part of a complete regimen.

Who is this for: THORNE Vitamin D-1,000 is intended for adults seeking a reliable, third-party-tested vitamin D3 supplement to support normal bone and calcium metabolism and to help maintain steady vitamin D status when sunlight or dietary sources are insufficient. It’s well suited for adults who prefer a moderate daily dose in an economical 180-capsule supply or for practitioners recommending routine maintenance dosing.

Ingredients

One Capsule Contains: %DV Vitamin D (as Vitamin D3) (1,000 IU) 25 mcg 125% Daily Value (DV) Other Ingredients: Microcrystalline Cellulose, Hypromellose (derived from cellulose) capsule, Leucine, Silicon Dioxide, Vitamin E (d-Alpha Tocopheryl).