Mike Lustgarten Posted August 20, 2021 Report Share Posted August 20, 2021 Quote Link to comment Share on other sites More sharing options...
Ron Put Posted August 20, 2021 Report Share Posted August 20, 2021 Thanks, Mike. By far the richest known source of vitamin K-2 is natto, there was a discussion here about it a while ago and some here consume it regularly. See also:Intake of fermented soybean (natto) increases circulating vitamin K2 (menaquinone-7) and gamma-carboxylated osteocalcin concentration in normal individuals Abstract Changes in circulating vitamin K2 (menaquinone-7, MK-7) and gamma-carboxylated osteocalcin concentrations in normal individuals with the intake of fermented soybeans (natto) were investigated. Eight male volunteers were given sequentially fermented soybeans (natto) containing three different contents of MK-7 at an interval of 7 days as follows: regular natto including 775 micrograms/100 g (MK-7 x 1) or reinforced natto containing 1298 micrograms/100 g (MK-7 x 1.5) or 1765 micrograms/100 g (MK-7 x 2). Subsequently, it was found that serum MK-7 and gamma-carboxylated osteocalcin concentrations were significantly elevated following the start of dietary intake of MK-7 (1298 or 1765 micrograms/100 g). Serum undercarboxylated osteocalcin concentrations were significantly decreased by dietary MK-7 (1765 micrograms/100 g) supplementation. Moreover, the changes in serum MK-7 level with the frequency of dietary natto intake were examined in 134 healthy adults (85 men and 39 women) without and with occasional (a few times per month), and frequent (a few times per week) dietary intake of regular natto including MK-7 (775 micrograms/100 g). Serum MK-7 and gamma-carboxylated osteocalcin concentrations in men with the occasional or frequent dietary intake of natto were significantly higher than those without any intake. The present study suggests that intake of fermented soybean (natto) increases serum levels of MK-7 and gamma-carboxylated osteocalcin in normal individuals. Quote Link to comment Share on other sites More sharing options...
Mike Lustgarten Posted August 20, 2021 Author Report Share Posted August 20, 2021 Yes, that's true, thanks Ron. I was focusing on other dairy-based sources in the video, but I should've at least mentioned natto. Quote Link to comment Share on other sites More sharing options...
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