Any interactions?:ashwagandha, magnesium l threonate,taurate,glycinate, fish oil, cdp choline,acetyl l carnitine,alpha lipoic acid, vitamin d,prilosec

None known but...: Most of the things you are taking are nutrients naturally present in a healthy diet. However, I advise against taking Prilosec regularly on a long-term basis due to common adverse effects. See http://www.naturalnews.com/036336_PPIs_acid_reflux_side_effects.html and http://chriskresser.com/get-rid-of-heartburn-and-gerd-forever-in-three-simple-steps

Why Supplements?: Since you're 17 years old, I am concerned that you are spending time and money wasting it on the supplements that you listed. While some of the substances are present in a healthy diet, there is actually no reason you should be taking them in the form of a supplement. You should be getting all the vitamin D you need in a healthy diet, and the other things, except Prilosec, are unproven.