So, as you are already aware, no doubt, the fat soluble vitamins are A, D, E, and K. But did you know you can OD on fat soluble vitamins? That's because they are stored in your fat, dummies. So don't take too many! Water soluble vitamins, on the other hand, feel free to take tons. Your body takes what it needs and the rest gets excreted in your urine; it is, therefore, a waste of money to take excessive doses of things like Vitamin C, but that doesn't stop people from recommending it to make money.
See how much smarter and thriftier you are already from reading this blog. It was NOT a total waste of your time, this time.