Vitamin K OEM/ODM Supplements: K1, K2 MK-7, Carriers & Assays

Name the vitamin K form precisely

Vitamin K1 and vitamin K2 are not sufficient detail for every sourcing decision. NIH lists K1 forms and K2 forms including MK-4 and MK-7 in supplements. If the project calls for MK-7, put that designation in the purchasing and formulation records.

Add the commercial preparation code and source description. Ask whether the received material is a concentrated ingredient or a standardized preparation in a carrier system. Do not treat all materials sold under K2 as a single interchangeable ingredient.

Define what the potency result measures

Request the assay method and reporting basis for the specified form. If the technical specification distinguishes isomers or related compounds, ask how those distinctions are measured and reported. Avoid treating an undefined total percentage as proof that every required identity attribute has been established.

Use the approved interpretation in the formulation worksheet. A diluted preparation needs a calculation connecting its input weight with the vitamin quantity under review. Keep carrier weight and assay corrections visible so the label number can be traced to the actual material.

Review carriers and source claims

Obtain a declaration of intentionally added preparation components, including relevant oils or dry carriers. If the brand has an origin or free-from requirement, ask for evidence applying to the specific preparation. A microorganism, fermentation, or plant reference alone does not answer all composition questions.

Compare the supplier’s sales description with its specification and component declaration. Resolve inconsistent names or missing carrier information before prototype approval. A nominally equivalent potency grade may involve a different preparation that changes the formulation and labeling review.

Evaluate handling and incorporation

Review the intended measuring, premixing, and incorporation sequence with the manufacturer. A relatively small ingredient quantity requires a process that can establish appropriate distribution. Total capsule or tablet weight cannot alone verify the distribution of the vitamin within the complete product.

For oil fills, liquids, powders, or gummies, evaluate the actual preparation under the relevant process conditions. Record formulation revisions and appropriate content observations. These formats are possible development paths, with suitability determined through the material and product evaluation.

Keep evidence claims separate from form selection

NIH notes limited comparative information for different supplemental vitamin K forms. Selecting MK-7 therefore should not be presented as a universal clinical superiority conclusion. Review proposed wording using the tested form, preparation, product context, and relevant outcomes.

Approve the final source, potency basis, process, and packaged stability plan together. A later switch from MK-7 to another K2 form, or a changed carrier at the same stated potency, should reopen the relevant review. The product file should remain more precise than its marketing category.

Explore relevant dosage forms

Compare manufacturing considerations for your intended product. Suitability depends on the complete formulation.

Common questions