Is it true that vitamins are nutrients that help regulate body activities?

YES!! Vitamins and minerals (including omega-3) are very important! Vitamins support normal growth, prevent eye problems, balance mood swings, help your neuro transmitters to work correctly (reducing anxiety and some studies believe ADHD), and help your organs to work properly, and help your skin stay young and gourgous! Consult a doctor to make sure your not too high on certain vitamins or too low before self prescribing the dose. It depends on where you live and the weather conditions on how much you need to take of certain vitamins such as vitamin D. Too much vitamins and minerals in your body is unhealthy and can cause serious problems.