21-year-old male with MPB. PRP treatments effective? Should I take Nutrafol vitamins? Should I take Minoxidil foam?

I recently went for a hair consultation with a well-respected doctor. I've had MPB for a few years now. My hairline has receded a good amount and the top has also started to thin. I'm not in the early stages, but I still have lots of hair. My doctor told me I should take Rogaine foam and Nutrafol vitamins (since I do not want Finasteride) and I will also undergo PRP soon. I'm afraid to take Minoxidil because of the side effects. Are Nutrafol vitamins effective? Is PRP an effective treatment?