Vitamin K2 or MK-7 or MK-4 for Calcium?

  • SpinRite v6.1 Release #3
    The 3rd release of SpinRite v6.1 is published and may be obtained by all SpinRite v6.0 owners at the SpinRite v6.1 Pre-Release page. (SpinRite will shortly be officially updated to v6.1 so this page will be renamed.) The primary new feature, and the reason for this release, was the discovery of memory problems in some systems that were affecting SpinRite's operation. So SpinRite now incorporates a built-in test of the system's memory. For the full story, please see this page in the "Pre-Release Announcements & Feedback" forum.
  • Be sure to checkout “Tips & Tricks”
    Dear Guest Visitor → Once you register and log-in please checkout the “Tips & Tricks” page for some very handy tips!

  • BootAble – FreeDOS boot testing freeware

    To obtain direct, low-level access to a system's mass storage drives, SpinRite runs under a GRC-customized version of FreeDOS which has been modified to add compatibility with all file systems. In order to run SpinRite it must first be possible to boot FreeDOS.

    GRC's “BootAble” freeware allows anyone to easily create BIOS-bootable media in order to workout and confirm the details of getting a machine to boot FreeDOS through a BIOS. Once the means of doing that has been determined, the media created by SpinRite can be booted and run in the same way.

    The participants here, who have taken the time to share their knowledge and experience, their successes and some frustrations with booting their computers into FreeDOS, have created a valuable knowledgebase which will benefit everyone who follows.

    You may click on the image to the right to obtain your own copy of BootAble. Then use the knowledge and experience documented here to boot your computer(s) into FreeDOS. And please do not hesitate to ask questions – nowhere else can better answers be found.

    (You may permanently close this reminder with the 'X' in the upper right.)


Mar 29, 2024
Has anyone got in to Vitamin K2 aka MK-7 or MK-4? According to this book "Vitamin K2 and the Calcium Paradox" it is what's needed to get the calcium in to your bones and not in to your arteries. I was wondering if anyone having success with it would recommend the exact supplement that they are taking. After the D3 Security Now podcast, I got the same brand that Steve was tanking then, and that worked out well,


Thank you Steve, with all the vitamin brands on Amazon its good to know one that is in use. This link went to Deal Supplements 5000 D3 and 100mcg K2, but I did find a Deal Supplements 200mcg stand alone Vitamin ( which may be good for me with allergies to only add on variable at a time, and keep on with the Now Brand D3 5000 and then switch to the combination D3 K2 from Deal Supplements when my Now D3 runs out.

Speaking of more variables, when I was researching K2, I ran across another supplement, Nattokinase. An article said that it helps to increase blood flow and works well with K2. Nattokinase also occurs naturally in the Japanese fermented soy food, Natto, that also contains a lot of K2 but does not sound appetizing.

Any one taking Nattokinase?


In the past, you spoke of the "three K's"
You have a great memory, Greg. It's been so long that I don't recall the science without reviewing it. I actually do take a second K supplement which contains both K2's plus K1: But, again, I couldn't defend that without refreshing my memory about what I once knew clearly about 20 years ago. :~)