Useful info
Interaction between fat-soluble vitamins A D K
Key ideas
Nutritionists talk about vitamin K as if there were only one type!
We know the role of vitamin K1 (phytomenadione) for its role in coagulation. It is mainly found in green vegetables.
Vitamin K2 (menaquinone) is less well known and has no RDA recommended by health authorities!
We can convert K1 into K2 but it is random and notoriously insufficient.
K2 plays a key role in the activation of hormones that regulate calcium metabolism: osteocalcin, which is involved in the mineralization of bone matrix, and matrix Gla protein (MGP), which protects soft tissues against calcification.
The role of vitamin K2 is not limited to these functions alone. Here, it is much more than a co-factor because vitamin K2 is the substance that allows dependent proteins A and D to activate/come to life. While vitamins A and D act as signaling molecules, telling cells to produce certain proteins, vitamin K2 activates these proteins, giving them the physical ability to bind calcium.
If more details wanted:
https://mirzoune-ciboulette.forumactif.org/t127-interaction-entre-les-vitamines-liposolubles#889
See second post for the original article in English.