> I took 2000IU (+K2) a day for many years in between testing my blood levels and still had <30ng/ml and had to go up to 5000IU/day.

Likewise, 23ng/ml while taking 2000iu/day of dry vitamin-d.

Switched to 5000iu +K2 in MCT oil, -- 8 months later I'm at 64ng/ml.

icedchai 2 hours ago | parent | next [-]

I switched from 2000 to 5000iu about 8 years ago. My levels went up similar to yours, but I don't feel much different!

rbjorklin 2 hours ago | parent | prev [-]

Any noticeable difference how you feel health wise? Energy levels? Mood? Sleep quality?

	▲	_0ffh 2 hours ago \| parent [-]
		Not the same person here, but a data point nonetheless. Before supplementing D3 I had a cold basically every year, sometimes twice a year. Since I brushed up my levels I average 1 cold in 6 years.