Among them, vitamin K2 (MK-7) is the most unique in the vitamin K2 family. It has been shown to have the highest bioavailability and a long half-life in the blood after oral ingestion, thus being able to exert its benefits over a longer time cycle.
Vitamin K2 Type | MK-4 (MENAQUINONE-4) | MK-7 (MENAQUINONE-7) | |
CAS No. | 863-61-6 | 2124-57-4 | |
Molecular Formula | C31H40O2 | C46H64O2 | |
Molecular Weight | 444.66 | 649.00 | |
Main Source | egg yolks, chicken legs and thighs | Natto | |
Absorption & Transfer | Rapidly removed from the liver by the same lipoprotein as a carrier | Redistributed primarily in the liver by low-density lipoproteins | |
Effective Use Level | mg/d (mg), three times a day, 15 mg each time (equivalent to 45,000 micrograms per day), and is required to be taken 500 times more than vitamin K2 (MK-7) | μg/d grade (microgram level), once a day, 90 micrograms each time | |
Production Process | Obtained by chemical synthesis | Naturally extracted or chemically synthesized | |
Functional Use | Osteoporosis | Osteoporosis, Improved arterial Calcification, Treatment of Parkinson's disease | |
Bioavailability | Studies have shown that the side chain of vitamin K2 (MK-7) is longer than vitamin K2 (MK-4), for which it can be stored in the human body for a long time, and its bioavailability in extrahepatic tissues is higher. |
ITEMS | SPECIFICATION | Test Result |
Appearance | Light yellow powder | Light yellow powder |
Oder | Odourless | Odourless |
Vitamin K2 (All-trans MK7) | 950ppm-1100ppm | 1064ppm |
Lead | ≤0.1mg/kg | negtive |
Mercury | ≤0.05mg/kg | negtive |
Arsenic | ≤0.1mg/kg | negtive |
Chromium | ≤0.1mg/kg | negtive |
Heavy metals | ≤ 10 ppm | < 10 ppm |
Total bacterial count | < 1000 cfu/g | 72 cfu/g |
Coliform bacteria | < 3.0 MPN/g | < 3.0 MPN/g |
Moulds and yeast | < 100 cfu/g | Conform |
Salmonella tropina | Negative | Negative |