Vitamin D3: plain or with K2?

Sold plain and sold with vitamin K2 added. Each class is compared separately, on D3 content only, and within labeled strength bands.

Of the 52 products across every type: 13 named at the exact package by a certifier, 1 at another size only, 38 in no database we searched.

Vitamin D335 products

1,000 to 50,000 IU per serving

A bottle price tells you little until you know the strength, so every softgel here is priced per 1,000 IU and compared within strength bands, never across them.

Vitamin D3 + K217 products

1,000 to 50,000 IU per serving

D3 sold with vitamin K2 added, priced per 1,000 IU of D3 within strength bands. The K2 dose is shown as the label states it and never affects the ranking.

Whether the K2 is worth paying for is a judgment rather than a computation, so it sits in Notes, with the trials it rests on.

Questions about vitamin d3

Which vitamin D3 brands are third-party tested?

Every vitamin D3 and D3 + K2 we track, grouped by whether a certifier lists the exact bottle, another size, or nothing we found. Absence is not a verdict.

Vitamin D3 1,000 IU vs 5,000 IU: which costs less?

What each strength costs per 1,000 IU, read from the labels and the prices we hold. A price comparison only: we do not say which strength anyone should take.

How much more does vitamin D3 with K2 cost?

Some brands sell the same softgel with and without K2, so the price of the K2 can be read from the labels. Compared at the same strength, from the panels.

Is BulkSupplements vitamin D3 NSF certified?

Which BulkSupplements D3 softgels NSF Certified for Sport names, at which bottle sizes, and which it does not, with the listing IDs.

Is Momentous vitamin D3 NSF certified?

Which Momentous vitamin D3 bottles we price NSF Certified for Sport names at the exact package. The listing IDs, the strengths and what each covers.

Is Thorne vitamin D NSF certified?

Thorne D-1,000, D-5,000, D-10,000 and the liquids checked against NSF Certified for Sport: which bottles a listing names, with the listing IDs.

What is the cheapest NSF certified vitamin D3?

Every vitamin D3 and D3 + K2 we track whose exact bottle NSF names in its Certified for Sport database, compared on cost per 1,000 IU within each strength.

Is a vitamin D3 label in mcg the same as one in IU?

Convert vitamin D3 mcg to IU and back, checked against every label we price: one mcg is 40 IU, so 25 mcg is 1,000 IU and 125 mcg is 5,000 IU.

Is Nature Made vitamin D3 USP Verified?

Nature Made vitamin D3, every strength and count we price, checked against USP’s Verified directory and the USP Verified Mark on each bottle’s label.

Cheapest means the cheapest we track, not the cheapest that exists. A price per 1,000 IU is a statement about price, not a suggestion of how much to take. How these numbers are made: How we compare.

What this rests on: prices we last recorded at the retailer named on each product page, which go stale, and each page says when it was checked; the products we track, not every product sold, and Amazon and Walmart are not among the stores; listings and labels read at the source, each linked from the page. Found an error? Tell us. The full method: How we compare.