I've been taking Carlson Vitamin K2 (menatetrenone - the mk-4 version of k2) for almost a year now. I started at 5mg every other day to every few days. Taking it sporadically like that made my teeth extremely smooth, got rid of excess plaque, and cleared up some ear issues.
I noticed a few months ago that I stopped seeing results so I tried switching to taking it every day at 5mg a day and then even tried taking it every day at 10mg a day. Still no results.
Any ideas on why I would stop seeing results on mk-4? The only thing that really changed the past couple months was me buckling down and taking my vitamin D every day. I tried stopping that to see if it would allow the mk-4 to start working again, but it hasn't.
Get Free Paleo Recipes Instantly
Vitamin D creates these little uncarboxylated proteins that Vitamin K then activates. If you're creating more of these undercarboxylated proteins than you can carboxylate by taking supplementary vitamin D then this would be a plausible cause for the undoing of whatever positive effects you had previously noticed from taking the k2-mk4 alone.
Try stopping the Vitamin d for a month and see if the results come back. You need to stop it for more than a few days to bring your vitamin d levels back down. Alternatively you could try taking more vitamin k, but that stuff is expensive so that wouldn't be my first choice.