If you are deficient in a specific nutrient and aren’t able to consume enough through diet, then it may be recommended to take vitamin and mineral supplements every day for the best results. “Adding a supplement when nutrient needs are increased, such as when trying to conceive, during pregnancy, or while breastfeeding, can be helpful beyond dietary changes,” says Adams. However, there are no supplements that every single woman should take daily, as supplement needs depend on your diet, lifestyle, and stage of life.