Vitamin D3 and Magnesium
They are all good for you. But you should be checked by a doctor first. You can over do on some vitamins and that’s not a good thing.
Vitamins C and D are the ones used most.
As for good vitamins, I would like to recommend you to take a look at those from https://discnts.com/product/solgar-ester-c-plus-vitamin-c-500-mg-100-vegetable-capsules for example. I often buy those for me, and they are really great I have to say. There are some awesome discounts for iHerb which will be very nice and pleasing for you too, good luck with it, guys ;)