“i take 50,000 units twice a week and it barely creeps up (and is still way below normal)”
For what it’s worth - I take 5000 i.u. D3 daily along with a fish oil gelcap and a 200 mg CoQ10 gelcap. I’ve been doing so for about a year and my level (last week) was 74.7 ng/ml (reference range = 32 - 100 ng/ml)
Your levels are perfect! When I first had my levels tested, I was at a 23. After supplementing @ 10K iu for the past 6 months, I am at a 58. My doctor wants me right about at 80.