If you're interested in getting more Vitamin D from your diet:
Natural Vitamin D Content in Animal Products
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3941824/
The Catholics were right. Eat fish on Fridays
Also, Carlson Labs is the highest rated Vitamin D supplement on LabDoor: https://labdoor.com/review/carlson-labs-vitamin-d3