To determine if you should take vitamins first look closely at your diet, if your diet follows the Food Pyramid Guide you probably will meet your needs. Women with heavy menstrual  flows  may need some iron.

Buyer be ware,  the most expensive Vitamin is biotin so watch for inexpensive fillers. Biotin promote the the synthesis of glucose, fatty acid, and DNA, and help to break down some amino acid, is found in eggs yolk, peanuts, and  cheese.

http://www.choosemyplate.gov/food-groups/

Food Pyramid