Some experts argue that 16 vitamins are a waste of money because they don’t provide any significant health benefits when taken as supplements. These vitamins include vitamin A, vitamin C, vitamin E, and many of the B-complex vitamins such as thiamin, riboflavin, and niacin. However, it’s important to note that many of these vitamins are still essential for overall health and wellbeing, and can be obtained through a healthy, balanced diet.