If you are a smoker, you should avoid taking any supplements that contain carotene. There have been numerous studies done that show carotene can increase the risk of lung cancer. Since cigarettes can add to this risk, it would be best if you avoided taking carotene if you are planning to continue smoking.
If you are planning to have a baby any time soon, folic acid is a must. This nutrient is used in brain development in a fetus and when you're low, defects can appear. In fact, taking a full prenatal vitamin if you are trying to get pregnant is a great benefit.
The tips you just read about vitamins and minerals should serve you well. It's always important to make sure your body is getting the right nutrients in order for you to stay healthy. Make sure you use the advice given so that you get all the vitamins and nutrients your body needs.