[anyover88]

I've mntioned on other sites re taking up to 5000IU of D3 and people have jumped up and down carrying on how dangerous that is... I've read up plenty myself on the issue and agree high doses are completely safe BUT I did read somewhere you shouldn't take high doses of D3 without vitamen K2. Do you know if this anyover?
For this reason I've onky been taking 2-3000iu until I get the k2 thing clarified.

Also same with iodine, the rdi JUST enough to stop us getting goitres let alone be of any health benefit

it's not necessarily dangerous to take high dose D3 without K2. I have taken one without the other for a long time. however both are more effective together for bone health among other things. D3 controls blood calcium levels, and K2 seems to store that in bones. bones actually play a very important role in the hormone system believe it or not!

After all there is an association between menopause and osteoporosis, and most people don't get good nutrition anyway. I think people are afraid because they think the larger dose d3 might calcify soft tissues or something. I don't think this has ever been proven but I probably wouldn't take that d3 without k2 anyway

this page says this about K2 dosage ranges depending on which K2 type you have:

The minimum effective dose for short chain menaquinones (MK-4) is 1,500mcg. Doses of up to 45mg (45,000mcg) have been safely used in a superloading dosing protocol.

The minimum effective dose for longer chain menaquinones (MK-7, MK-8, and MK-9) is between 90-360mcg. Further research is needed to determine the maximum effective dose for MK-7.