I work with a nutritionist for specialized health issues that I've been dealing with. We do a Micronutrient Test and the MRT/Leap food sensitivity test to establish a baseline and work from there as to what I need more/less of. We redo the tests every few years to make sure we are on the right track. I would agree that a good multi vitamin should be fine. Other than that, you need to work with someone knowledgeable to guide you and suggest brands etc. Not all vitamins/supplements are equal.