@
Subteigh: you're probably confusing the Vitamin-D dosages: you are speaking of 8.5-10mg (milligrams), but it should probably be 8.5-10μg (micrograms) recommendation, hence the factor 1000 overdose when taking Vitamin D in the milligram range. Over here in Holland the elderly are recommended to take extra Vitamin D on a daily basis of 10-20 micrograms.
I'm currently on 20μg daily on doctors orders, some of my blood values are too high and my Vitamin D level is to low.