Absorption may be decreased by as much as 50 bluoxyn percent when taken with a meal or a snack. A woman who's pregnant or breast-feeding. You need more of some nutrients, especially folate and iron-and perhaps calcium if you don't consume enough calcium-rich foods. Check the label's Supplement Facts to make sure you get enough for a healthy pregnancy. Ask about a prenatal vitamin/mineral supplement.Someone unable or unwilling to regularly consume a healthful diet to grow taller? You likely need a dietary supplement to fill in the nutrient gaps. However, eating smarter would be better if you don't have food-related health problems! Take a supplement with the advice of a doctor or a registered dietitian. For example, pre-menopausal women who don't consume enough calcium to grow taller and stronger bones from food likely need a calcium supplement-unless they're willing to improve their diet. Some babies after age six months, children, and teens may need a fluoride supplement to grow taller and perhaps iron or vitamin D.