I think it is better to ask your doctor. First of all, you need to see what vitamin is not sufficient in your body because it is not good to take vitamins which you already have enough in your body. Vitamin overdose is worse than vitamin deficiency. However, I think multivitamin is the best choice as it has small amounts of every vitamin. You may also take vitamin C as it is an immune booster, I take it from https://shopwellabs.com/collections/wellabs-capsules, here are a variety of vitamins, so you can find what you need.