Thorne D-1,000 Vitamin D3

A simple D3-only capsule providing 25 mcg (1,000 IU) of vitamin D3 per capsule, in the 180-capsule presentation shown on the current product image.

Best For: Simple 1,000 IU D3-only capsule

Why choose it: It provides a moderate 1,000 IU dose of vitamin D3 per capsule without added vitamin K, making the formulation straightforward to compare with D3 + K2 products.

Avoid if: You already receive enough vitamin D from other supplements, have a condition affecting calcium metabolism, or a clinician has advised you to individualize vitamin D intake.

Trade-off: It does not carry the USP Verified differentiator of the Nature Made option and does not include K2 like the Performance Lab formula.

25 mcg (1,000 IU) vitamin D3 per capsule
Vitamin D3-only formula with no added vitamin K
180 capsules in the current product presentation
One-capsule serving size

Quality Verification

Thorne states that it tests raw materials and finished products for identity, purity and potency. TrueMontis is not attributing NSF Certified for Sport status to this D-1,000 SKU.

Safety Check

Count vitamin D from multivitamins, calcium products and other supplements before adding a separate vitamin D product.
High vitamin D intake can raise blood calcium; review supplementation with a clinician if you have kidney disease or another condition affecting calcium metabolism.
Use the dose appropriate to your total intake and individual needs rather than assuming more is better.

Dose note: Each capsule provides 1,000 IU (25 mcg) vitamin D3. The adult tolerable upper intake level is 4,000 IU (100 mcg) per day from all sources unless a clinician recommends otherwise for a specific reason.

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How to Use It

Use according to the current manufacturer directions or your healthcare professional's guidance.
Count vitamin D from the rest of your supplement routine before deciding how many capsules fit your total daily intake.

Product Specifications

Serving size: 1 capsule
Vitamin D3: 25 mcg / 1,000 IU (125% DV)
Vitamin D form: Vitamin D3
Package count: 180 capsules
Other ingredients: Microcrystalline cellulose, hypromellose (derived from cellulose) capsule, leucine, silicon dioxide, vitamin E (d-alpha tocopheryl)

Purchase Options

Amazon

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Manufacturer Claims

The following statements are made by the manufacturer and have not been independently verified by TrueMontis.

Thorne quality information Thorne states that its quality program includes testing for identity, purity and potency.

Quick Verdict

Best For: People who want a straightforward D3-only capsule at 1,000 IU per capsule

Main Advantage: Simple moderate-dose formulation that is easy to compare and adjust within total intake

Main Trade-Off: Fewer product-specific certification differentiators than the USP Verified Nature Made option

TrueMontis Take: A clean third comparison option for shoppers who prefer 1,000 IU D3 without added K2; the main decision should still be based on actual vitamin D need and total daily intake.