Personal Paleo Code - Eat Real Food

You might be thinking a multivitamin can prevent nutrient deficiency, but supplemental nutrients do not have the same effect on the body as nutrients gotten form food.  Humans have evolved to get their nutrients from whole foods - not supplements.  Most nutrients require specific enzymes and other substances to be properly absorbed.  While these are naturally present in foods, they are often not included in synthetic vitamins and isolated nutrients.  This may explain why several trials have shown that adding antioxidant supplements to a typical American diet not only doesn't prevent people from getting heart disease and cancer but may actually increase their risk.  While supplements can (and should) be used for therapeutic effect in specific health conditions or to replace certain nutrients that are difficult to obtain from food, they should never be used to replace nutrients that can be found in a  nutrient-dense diet.
Chris Kresser, Your Personal Paleo Code

This is as good as it gets for learning how to eat for health, including how to address your specific issues of health and wellness.