I also ride in the sun, but I take 5000iu of D3/day + K2.
Vitamin D mobilizes calcium in your body, taking K2 stops the calcium from lodging in your cardiovascular system and directs it to your bones and teeth etc.
I used to take 1000IU/day for years, my blood level was constantly 50nm/l, when covid came I upped the dose to 10,000iu/day.
Next blood test the doctor told me that I had overshot with my D and that my level was 186 nm/l, I then reduced my dose to 5000 iu/day.
I haven't been back to the doctor since, but my wife has tested at 150nm/l which is about top of the ideal range of 50 - 150nm/l.
We did get Covid 2 years ago and we felt pretty ordinary for 3 days and then just a bit ragged for another 10 days.
These are the ones that I take, I could not find anything more than 1000iu tablets locally, I don't want to have to take 5 tablets a day.
They obviously work well judging from the blood test results.
NOW Foods, Vitamin D-3, High Potency, 5,000 IU, 240 Softgels (iherb.com)Vitamin D (iherb.com)
