THORNE Vitamin D3 Supplement 1,000 IU — 90 Softgels for Daily Bone & Immune Support

THORNE Vitamin D-1,000 delivers 1,000 IU of vitamin D3 (cholecalciferol) per capsule in a clean, third-party tested formula designed for daily support of bone, immune, and overall vitamin D status.

Many people do not get enough sun exposure or dietary vitamin D; THORNE Vitamin D-1,000 supplies a reliable, well-absorbed D3 dose in a convenient 90-capsule bottle. Each softgel contains cholecalciferol — the form of vitamin D that research shows raises serum vitamin D most effectively — and the product is third-party certified to ensure label accuracy and purity.

How does THORNE Vitamin D-1,000 fit into a daily routine?

Take one capsule per day with a meal to help maintain consistent vitamin D intake. The softgel format is easy to swallow and best absorbed when taken with dietary fat.

• Suggested use: one capsule daily with food
• Format: softgel for easy swallowing
• Best absorption: take with a meal containing fat
• Supply: 90 capsules — about three months at daily use

What makes the D3 in this formula different from other vitamin forms?

This product uses cholecalciferol (vitamin D3), which studies show increases blood vitamin D levels more effectively than vitamin D2. THORNE emphasizes purity and potency, and this formula has been third-party tested to confirm ingredient identity and contaminant levels.

• Active form: cholecalciferol (D3)
• Comparative potency: D3 generally raises and sustains vitamin D levels more effectively than D2
• Quality checks: third-party testing for label accuracy and contaminants

Who should consider taking this 1,000 IU supplement?

People with limited sun exposure, those who work indoors, individuals living at higher latitudes, or anyone advised by a healthcare professional to maintain or increase vitamin D intake may benefit. It provides a moderate maintenance dose that fits many daily supplementation strategies.

• Useful for indoor workers and winter months
• Appropriate as a maintenance dose for many adults
• Consult a healthcare provider for personalized dosing recommendations

Is this product tested and trusted for quality?

THORNE Vitamin D-1,000 is third-party certified to verify that what’s on the label matches what’s in the bottle and to confirm there are no unsafe contaminant levels. THORNE is widely used in clinical and athletic settings and is commonly recommended by practitioners.

• Third-party testing for purity and label accuracy
• Brand recognition: used by professional teams and clinicians
• Manufactured under quality-focused standards

Who is this for: THORNE Vitamin D-1,000 is intended for adults seeking a moderate daily vitamin D3 supplement—especially those with limited sun exposure, people living in northern climates, and anyone wanting a third-party tested product from a clinically recognized brand. As with any supplement, consult a healthcare professional before beginning use, particularly if you are pregnant, nursing, taking medications, or have a medical condition.

Key product features:

• 1,000 IU vitamin D3 (cholecalciferol) per softgel
• Supports calcium absorption and maintenance of healthy bones*
• Formulated for optimal absorption compared with D2
• Third-party certified for purity and label accuracy
• Trusted clinical brand used by professionals and athletes

*Statements relate to nutrient function and are not claims of disease prevention or treatment. Always follow label directions and your healthcare professional’s guidance.

Ingredients

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