The choice for supplements should begin by first understanding your body, and most especially your diet.
They are designed to fill nutritional gaps in your diet, and for most people, it is always safe to start with multivitamins. If you are looking to find a specified formula, ensure to find one that suits your nutritional needs and your age.
A good example of this is iron in women. If you are over 50 years of age, 8mg per day is enough, while women under 50 require 18 mg per day.
For multivitamins, the dosage is the same. If you are over 50, you will need 8mg per day, but if you are under 50, you shall need 18mg per day.
Now, on the other hand, multivitamin alone is not enough, and most people tend to mix it up with calcium and Vitamin D.
The best advice, however, would be to speak to your health care provider who will be able to advise you very well and clearly on what you should and shouldn’t take, plus the amount you require of each nutrient for your body to function as it is supposed to.