I dont want to buy a combination of both because it usually contains a D3 dosage of 1000, I want to go for 5000 though (+1000 from my Multivitamins).
I read that you should always go for Mk-7, since it last for the whole day while Mk-4 lasts only for a couple hours. the source is an Amazon review though LOL, so it might be not accurate.
You are right as well, MK-7 seems to have a much higher bioavailability and plasma half-life than MK-4. However, if you take 5000 IU, you'd get 1mg of MK-4 from the Thorne liquid, which is a sensible amount (
LEF's Super K contains the same amout of MK-4).
5000 IU of vitamin D is what I take too, living in this dark and cloudy country
![;)](http://www.longecity.org/forum/public/style_emoticons/default/wink.png)
However, I should warn you that our infamous Zoll hold back that bottle I ordered from iHerb for about 16(!!) weeks. So if you order now, your vitamin D will probably arrive seasonable for spring time...
![:dry:](http://www.longecity.org/forum/public/style_emoticons/default/dry.png)
Oh, and don't ever think of ordering anything from outside of Europe that has more than 1000 IU as one serving printed on the bottle. Otherwise you are illegaly importing a prescription-only drug which will be seized and you may have to pay a fine.
If doesn't matter how much vitamin D is in the bottle, just what is suggested on the label...
Edited by timar, 06 December 2013 - 05:05 PM.