You should avoided all. Just make sure you eat healthy
One is fat soluble vitamins!
When you eat foods that contain fat-soluble vitamins, the vitamins are stored in the fat tissues in your body and in your liver. They wait around in your body fat until your body needs them.
The other is water soluble vitamins!
When you eat foods that have water-soluble vitamins, the vitamins don't get stored as much in your body. Instead, they travel through your bloodstream. Whatever doesn't go through your blood stream comes out as urine.
Good luck love!
Possible consequences: Pregnancy, legal issues because she is a minor and he is 18, parents could be an issue, STI or STD, there's a whole list of things that could go wrong. Hope this helps! =^-^=
All of the above since they are all caused by a virus.