3 ms·
Which vitamin K2? There are distinct: – short-chain menaquinone or menatetrenone: MK-4 – long-chain menaquinones: MK-5, MK-6, MK-7 (found in natto) and poorly
by inkyoto 3y ago
Which vitamin K2? There are distinct:
– short-chain menaquinone or menatetrenone: MK-4
– long-chain menaquinones: MK-5, MK-6, MK-7 (found in natto) and poorly studied MK-8 and MK-9.
The study does not mention which one of them was used in the study, it only cites the amount used being 720 mcg. Since the supplementation with long-chain menaquinones in dosages larger than 200 mcg per day is considered dangerous due to excessive blood thinning effects, it is reasoanble to presume that the MK-4 form was used. But MK-4 has been studided for its calcium redistribution effects in the body in clinical dosages of 45 mgs, which is two orders of magnitude larger than that of used in the study.
The article also conflates natto as being a source of K2 with being a source of the menaquinone (mostly MK-7 but also other long-chain menaquinones) but not menatetrenone. Truth to be told, there are better studies out there.