Vitamin D-1,000 - 180 Servings

Optimize vitamin D levels fast—clean D3 for strong bones, immunity & overall wellness.

Please note: Thorne charges a flat $5 fulfillment fee on ALL Thorne orders, despite the size of your order.

Thorne Vitamin D-1,000 – High-Potency D3 for Strong Bones, Immune Support & Heart Health

Not getting enough sun or struggling with low vitamin D levels? Thorne Vitamin D-1,000 delivers 1,000 IU of highly absorbable vitamin D3 per capsule (180 servings) to support calcium absorption, maintain muscle strength, promote cardiovascular wellness, and enhance immune resilience—all in a clean, hypoallergenic formula without preservatives or lactose.

• 1,000 IU vitamin D3 boosts calcium uptake for stronger bones and teeth.

• Immune system support helps protect against seasonal stressors and respiratory challenges.

• Muscle function aid supports strength and endurance for active adults and seniors.

• Cardiovascular promotion supports healthy blood pressure and arterial function.

• Brain health & mood support contributes to stable cognition and emotional balance.

• 180 servings per bottle – long-lasting, third-party verified purity and potency.

Thorne uses cholecalciferol (D3), which is clinically shown to raise blood vitamin D levels 87% more effectively than D2, in capsules free from common allergens and fillers. Every batch undergoes independent testing for label accuracy and contaminant safety, outperforming generic gummies or synthetic blends.

Ideal for indoor lifestyles, northern climates, darker skin tones, or aging adults—populations at highest risk for deficiency. Safe daily maintenance supports bone, heart, and muscle health without risk of toxicity when used responsibly, and pairs well with vitamin K2 for arterial protection.

5-Star Reviews from Real Customers

"Energy returned, aches gone after 3 weeks. Blood levels perfect now!" – Freya U.

"Immunity rock-solid this winter. Simple, effective D3." – Theo Y.

"Muscle strength back at 65. No fishy taste like others." – Isla V.

"Mood lifted, bones stronger. 180 caps = daily staple." – Sienna F.

"Lab-confirmed optimal levels. Thorne quality unmatched." – Kenji M.

How to Use

Take 1 capsule daily with food, or 1–3 capsules per day based on your healthcare provider’s guidance. Test blood levels first to adjust dosing according to deficiency and sun exposure.

FAQs

Is D3 better than D2?
Yes – D3 is up to 10x more effective at raising 25(OH)D levels in the blood.

Is it safe for daily use?
1,000 IU is ideal for maintenance; most adults can safely take up to 4,000 IU daily without risk.

Who benefits most from supplementation?
Indoor workers, residents of northern latitudes, individuals with darker skin, older adults, or those with higher body fat are at greatest risk of deficiency.

Can I combine with vitamin K2?
Yes – D3 improves calcium absorption, and K2 directs calcium to bones instead of arteries.

Is the formula clean?
Yes – no lactose, preservatives, or allergens; third-party verified for purity and potency.

When will I see results?
Blood vitamin D levels rise within 2–4 weeks; bone and muscle benefits may take several months.

Warnings & Disclaimers

Consult your healthcare provider if pregnant, nursing, or hypersensitive to ingredients. No known interactions. These statements have not been evaluated by the FDA. Not intended to diagnose, treat, cure, or prevent disease.