Is it ok to take bags of my daily, pre separated vitamins? Or is it best to leave them in the bottles they come in? And if so, should it be unopened? I've only flown once and it was when I was a kid.

Despite the long list of regulations for air flight, the TSA is less strict on the topic of travelers' medications. Travelers are permitted to carry only 3.4 ounces of liquid in their carry-on bag, but the TSA does not limit the amount of liquid medication you can carry onto a plane. Other medication, including pills and vitamins, are also permitted in your carry-on luggage in unlimited amounts.

You should keep them in the original bottle. Also consider purchasing after you arrive at your destination