Life Extension, Super K, with MK-7, Depot, High Dose, 90 Softgels, Laboratory Tested, Gluten-Free, SOYA-Free, Non-GMO

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Because K2 is also produced by gut bacteria, there’s some evidence that antibiotics can contribute to K2 deficiencies.( 8)( 9) Some suggest the RDA should be higher, and a tolerable upper limit (TUL) — basically the maximum amount you can ingest before experiencing negative side effects — hasn’t been established.( 4)( 5) This is because no incidences of toxicity have been seen with Vitamin K, even when taking it as a supplement. That said, we do need more research in this area.

The MK-4 form of K2 has been shown to be rapidly absorbed, but to only last in the bloodstream for a short time.MK-7, on the other hand, was demonstrated to stay available in the body for up to 48 hours and at much higher levels. And our MK-7 is made from an innovative bio-fermentation process. Super K provides THREE kinds of vitamin K: vitamin K1 and two unique forms of K2, menaquinone-4 (MK-4) and menaquinone-7 (MK-7). So taking Super K every day is a good way to make sure you're getting enough of this essential nutrient for bone and vascular heath.

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Thorne’s Vitamin K supplement contains three forms of the vitamin, with a particular emphasis on MK-4.

Supplemental vitamin K2 can be in either the MK-4 or the MK-7 form, and aside from slight differences in how long each form stays in your body, there is very little evidence as to whether it matters what form you get your vitamin K2 in. In addition to 120 mcg of vitamin K dissolved in cold-pressed flax oil, you’ll also get extracts from spinach, Brussels sprouts, kale, and a whole host of other fruits and vegetables. If you want a vitamin K supplement that takes a more holistic approach, this should be your choice. 5. Mary Ruth’s Vegan Vitamin K2 MK7 Drops Vitamin K helps maintain bone density by facilitating the incorporation of calcium into your bones. 1 Vitamin K also supports normal function of a protein called matrix Gla-protein (MGP). 2 MGP helps regulate how calcium interacts with your arterial walls. 3 So in addition to facilitating calcium incorporation into bone, vitamin K helps promote a healthy calcium balance in your arteries as well. Spronk HM, et al. Tissue-specific utilization of menaquinone-4 results in the prevention of arterial calcification in warfarin-treated rats. J Vasc Res. 2003 Nov-Dec;40(6):531-7.Of course, none of these make sense without adequate calcium intake, but that almost goes without saying if you are trying to increase your bone strength. Can Vitamin K help depression? Vitamin K has been linked to reducing the symptoms of depression. Still, there is not enough evidence to support this in clinical trials. A Vitamin K supplement is not a suitable treatment for depression, and you should consult your doctor if you are looking for a treatment. The only side effects to be aware of are the potential interactions with medications for blood thinning, like warfarin.

But then I sent Life Extension Super K formula to the lab in Norway can measure both cis and trans isomers of MK-7. Vitamin K2 is absorbed much more efficiently than vitamin K1. The MK-4 form of vitamin K2 is the most rapidly absorbed and is now routinely used in Japan to maintain healthy bone density. However, it only remains active in the blood for a few hours, unlikeMK-7 form that remains for 24 hours. Super Booster now provides a potent dose of MK-7 to keep calcium in the bone and out of the arteries, along with MK-4 and vitamin K1.Well, it looks like they're at it again, this time with Super K. This product already contained a generous dose (100 mcg) of the most important component, Vitamin K2-menaq7. But now it looks like they've doubled it to 200 mcg. Why? Most single-ingredient K2-menaq7 products contain either 45 mcg or 90 mcg, with the latter being a "higher dose." In fact, I don't think I've ever seen another product above 100 mcg. While LEF's change gives me pause I'll keep taking it because it's a good value considering it combines all the key varieties of Vitamin K, and because I only take it every other day (I understand menaq7 has a long half life). And LEF is generally a quality brand. BTW, on a more minor note, I'm sorry to see that they removed medium-chain-triglycerides.