Super K from Life Extension is a softgel supplement delivering three distinct forms of vitamin K in a single daily capsule. Each softgel provides vitamin K1 (as phytonadione) at 1500 µg, vitamin K2 as menaquinone-4 (MK-4) at 1000 µg, and vitamin K2 as all-trans menaquinone-7 (MK-7) at 100 µg — together contributing 2600 µg of total vitamin K activity. A small amount of vitamin C, supplied as ascorbyl palmitate, is also included. This 90-softgel pack offers a straightforward way to cover multiple forms of this fat-soluble vitamin that can be difficult to obtain consistently through diet alone.
Vitamin K1 is the form most commonly found in leafy green vegetables, while K2 occurs naturally in fermented foods, certain cheeses, and some animal products. The MK-7 used in this formula is produced via a bio-fermentation process. Together, these three forms make Super K a comprehensive option for those who want broad vitamin K coverage rather than a single-form supplement.
Presented in an easy-to-swallow softgel format, Super K suits adults who follow a varied diet but feel their vitamin K intake may be inconsistent — including those with limited vegetable consumption or who simply prefer the certainty of a multi-form supplement.




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