 Vitacost | $ 14.95 | |
 iHerb | $ 14.95 | |
 Walmart | $ 13.46 | |
| iHerb | $ 14.95 |
A simple capsule clearly provides vitamin K2 as short-acting MK-4 at very low serving cost. The label provides enough detail to judge the central vitamin strategy.
The 100 mcg amount is too small for a compelling MK-4 strategy, which usually requires a different dosing approach than MK-7. Format, dose, and companion nutrients determine whether it is appropriate for daily use.
The best fit is users specifically directed to take a low MK-4 amount. Vitamin K and vitamin D support normal physiology, but the practical benefit depends on baseline intake and individual need.
Menatetrenone is MK-4, a shorter-acting K2 form that is less practical at this amount than MK-7, and the 100 mcg MK-4 amount is small compared with the quantities generally used for this shorter-acting form. The listed MK-4 amount is not excessive, although it may be too small for its intended role, while mK-4 fits vitamin K2 use, but the short-acting form is weakly matched to a low once-daily amount.
.Every listed active ingredient has a specific amount, and no proprietary blend hides the dose of a listed active ingredient. Serving count is supplied, but complete daily-use directions are not provided, while inactive ingredients and excipients are not included in the supplied label details.
.The supplied average rating is strong, and substantial review volume gives the average rating useful credibility. Specific review themes are unavailable, so repeated negatives and real-world fit remain uncertain.
.Dose or form limitations make the formula difficult to justify on quality alone, and the very low serving cost provides excellent practical value. The focused active profile is not inflated by low-value additions, while the product is reasonably competitive but lacks a clear quality or value advantage.
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Vitamin K2 is relevant to calcium metabolism, but the MK-4 form is supplied at a modest amount. Clear subtype and amount disclosure make the label easy to assess.
The dry capsule lacks a stated lipid carrier, and the amount is less compelling than doses commonly used for short-acting MK-4. Vitamin K can interfere with warfarin and other vitamin K antagonist medicines, so users of those drugs need clinician-guided consistency.
Vitamin K2 as MK-4 is relevant to calcium handling and bone maintenance. Its healthy-aging value is mainly foundational for skeletal and vascular function rather than a direct cellular-longevity effect.
The 100 mcg MK-4 amount is far below amounts commonly used for this shorter-acting form. Vitamin K can counteract warfarin and other vitamin K antagonist anticoagulants, so medicine dosing requires clinician-guided consistency.
Vitamin K2 is relevant to calcium regulation, but the product uses short-acting menaquinone-4 rather than the preferred MK-7 form. The 100 mcg amount is far below the milligram-level amounts commonly used for focused MK-4 supplementation.
A single clearly identified active keeps the label simple, yet it offers limited cardiovascular depth at this dose. Vitamin K2 can oppose warfarin and related vitamin K antagonist medicines, requiring clinician-guided consistency for users of those drugs.
Vitamin K2 can activate proteins involved in binding calcium within bone. The label identifies menatetrenone, also called MK-4, as the sole active form.
The supplied amount is far below the milligram-scale MK-4 doses commonly used in direct skeletal research. Without vitamin D, calcium, magnesium, or matrix support, the product offers a narrow and underdosed bone pathway.
MK-4 supports vitamin K biology but is less aligned with sustained arterial calcium management than MK-7. Cardiovascular evidence for this low MK-4 amount is limited compared with longer-lasting MK-7.
The menatetrenone amount is far below amounts typically used for MK-4-specific effects. Menatetrenone is clearly identified, but the format offers no absorption-focused lipid details.
| Ingredient | Amount per serving |
|---|---|
Vitamin K2 (Menatetrenone) | 100 mcg |
The formula supplies vitamin K2 as menatetrenone, the shorter-acting MK-4 form, rather than the preferred MK-7 form. Its low serving cost is attractive, but it does not provide an effective MK-7 serving and gives no fat-focused intake guidance. Vitamin K can counteract warfarin and other vitamin K antagonist anticoagulants, so users of these medicines need clinician-guided consistency.
Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.
