After my cancer diagnosis I met with a nutritionist who stated it’s always best to get your vitamins & minerals from food. With that being said she also encouraged supplements if the diet fell short. Finding a nutritionist to discuss your needs might be helpful and using an App to track the vitamins/minerals obtained from food could also be good.
Doctors don’t have as much knowledge in nutrition & supplements, their knowledge is medicine.
Recently I reduced the supplements I take and now I take CoQ-10, Beet Root Extract, Folic Acid, Iron, Vitamin D, and a Multi-vitamin.