Absolutely; the word "vitamin" is Latin for "vital for life". You cannot create vitamins in your body, so they must come from your diet.
A healthy diet full of proteins, whole grains, fruits and vegetables and good fat can provide the essential nutrients you need, but only one in ten people actually follow this diet. Ultimately, the majority of people don't get all of the vitamins and minerals their bodies need to function properly and healthily, so taking vitamin supplements help ensure your basic needs are met.
Research also shows that supplementation with vitamins and minerals can optimise the function of your body system. This will help you think, feel, perform and sleep better, and age in a healthy way.