I have taken 5000 units of D3 daily (mornings) for many years. Also calcium and multivitamin (dinner).
I have enjoyed very good health. I did have a 2-day stomach flu last winter, but can’t remember any other bouts of “illness”, going back for over a decade or longer.
I also think the D helps to level out moods for me and/or steadier energy levels. When tested for bone density several years ago (age in upper 50s), the doctor told me my bones should last until I’m about 200 years old.
I read in a couple of places that sunshine/vitamin D is the only effective remedy for depression, I have watched that play out multiple times now.Walk in the sunshine everyday in the summer and take D3 through the winter. D is also the premier prophylactic for respiratory and maybe other viruses.
Daughter dispensed with the Xanax she had been taking for years three weeks after she started with the D3. The Xanax didn’t fix anything. It blanketed her emotions so she really didn’t ever feel sad or happy either. The D actually fixed things.