Vitamin K2 MK-7: What to Know Before Buying

Quick Answer

For most people, vitamin K2 as MK-7 is the better choice due to its longer half-life and once-daily dosing. Look for a third-party tested, vegan formula with an oil-based delivery for optimal absorption.

Why MK-7 is Often Preferred Over MK-4

Vitamin K2 comes in two main forms: MK-4 and MK-7. MK-4 has a short half-life, so it typically needs to be taken multiple times a day to maintain steady levels. MK-7 stays in the bloodstream longer, which means a single daily dose is usually sufficient.

MK-7 is also more bioavailable, meaning your body can use it more efficiently. This makes it a practical choice for supporting bone health and cardiovascular function.

Understanding the Right Dosage

There is no official recommended daily allowance for vitamin K2, but research commonly uses doses between 90 and 200 mcg for MK-7. A 100 mcg serving is a reasonable starting point for general wellness.

When comparing products, check the serving size and the amount of MK-7 per serving. Some labels list the amount per capsule, while others list per two capsules, so be sure to compare apples to apples.

Form Matters: Oil-Based Delivery

Vitamin K2 is fat-soluble, so it's best absorbed when taken with fat. An oil-based delivery, such as organic MCT oil, can help improve absorption and make the supplement more convenient to take with meals.

If you follow a vegan diet, look for a product that explicitly states it's vegan. Some K2 supplements use animal-derived ingredients, so checking the label is important.

Decision Rules for Choosing Vitamin K2 MK-7

• Check the form: Choose MK-7 over MK-4 for once-daily dosing and better bioavailability.
• Verify the dose: Look for a product that provides 100 mcg of MK-7 per serving, a common research-backed amount. Check if the dose is per capsule or per serving to avoid under- or over-dosing.
• Confirm the base: If you're vegan, ensure the product is labeled vegan and check that the delivery medium (like MCT oil) is plant-based. Always review the full ingredient list for allergens or animal-derived additives.

Product Spotlight

• Vegan Vitamin K2 as MK-7: Provides 100 mcg of MK-7 per serving with an oil-based delivery using organic MCT oil. This aligns with the commonly studied MK-7 dosage and supports better absorption, especially for those taking it with meals.

  

Who Should Choose This Supplement?

Best for

• People looking for a convenient once-daily vitamin K2 supplement
• Those following a vegan or plant-based diet

Not for

• Individuals who prefer MK-4 due to a healthcare provider's specific recommendation
• Those who cannot take supplements with fat-containing meals