An economical and excellent way to get Vitamin D is to go out in the sun during high sun time for 30 minutes.
If you time it with a 30 minute walk, it is a twofer.
Also, you will get free Dopamine, which will improve your mood and outlook on life and help if you have the blues or Parkinson’s.
A younger relative complained, he didn’t have time to do this. His mother, my wife is an RN. She told him to drive home during his lunch hour 5 min. Then, he, his wife and their dog can walk and have lunch in the good daylight. They take doggie treats with them.
He started last month, and his wife drives to his work place sometimes. Regardless, they and their dog walk while talking and eating in the sunlight.
Yep, I'm starting that regimen also.