I recently tried supplementing with vitamin K2 (menaquinone) in reasonably large doses (~300-500 micrograms a day or so for several days) for arterial health since the stuff cleans up arterial calcification like drano. The result was brain fog, which only faded after several days. I'm wondering why that happened, if it might cause long term damage, and if there's some way to work around it.
Possible hypotheses for why this happened;
1. Liver storage of glycogen was increased, 'starving' the brain.
2. A calcium imbalance was created since bones couldn't demineralize calcium and dump it into the blood stream.
3. Coagulation increased significantly, resulting in stickier blood.
Do any of those seem like valid reasons for a mental slowdown? I had resisted supplementing with calcium since I wanted to clear as much plaque as possible (I've never been tested to show that I have plaque, but it runs in the family.)
I got the same effects, but weaker, eating Japanese natto. Natto is high in K2.