MK4 vs MK7
on 1/4/10 11:57 am
About half way down the article is good info about absorption time and availability of MK4 vs MK7; also consider if you are on blood thinners. Hope this helps.
I think the article you posted answers your question and one that I had. I had been wondering why so much of the research used the MK-4. (I should have known to follow the money trail.) Well, it says that the Mk-4 is a synthetic compound so I assume there is a high profit margin for both the manufacturer and the supp co's. And... the company that makes the MK-4 sponsored the studies, so that's why they are using the MK-4. They looking for more positives on the product they sell. Geesh! The article states:
The limited data available, however, point towards MK-7 as most potent K-vitamin.
MK-4 remains active in human blood for only a few hours after ingestion. The MK-7 form of vitamin K2, on the other hand, remains bioavailable in the human body many days after ingestion. So i don't think the higher mcgs in the MK-4 really get you anything.
on 2/25/10 1:26 am
These two links have much more information on the real differences between MK4 and MK7:
"The investigators found that MK-4 strongly activates transcription of two specific genes in osteoblast cells. Osteoblasts are cells that create bone tissue. The genes are GDF15 and STC2 and they're involved in bone and cartilage formation. They tested K1 and MK-7, and in contrast to MK-4, they did not activate transcription of the genes in the slightest. This shows that MK-4 has effects on gene expression in bone tissue that MK-7 doesn't have."
Also, MK4 is most likely the activator that Dr. Weston Price found was needed in combination with Phosphorus, Vitamin A, D and calcium to regrow decayed teeth.