Millions of people take a daily multivitamin, myself included. I like to take one just to be sure that I'm getting all of those little nutrients. If you look at the grocery store you may have a difficult time finding vegan multivitamins, but they are available online. In our house, my husband and I take the Deva Vegan Vitamins Daily Multivitamin.
We always purchase several bottles of them at once, so that we get the free shipping. The vegan multivitamin is always good for a long time out, so we use it up by the time it hits the expiration date.
By taking a vegan daily vitamin you ensure you get your Vitamin B12, D, etc. It's a simple way to make sure you get what you may not be getting in your food. Plus, they are not expensive, especially when you order them on Amazon and get the free shipping.