I was just researching this same issue. Wish someone with knowledge had replied to your post. I am an alcoholic and drink daily and I can't stop. Since my drinking has progressed, I notice that I no longer have that mental 'snap' on the job and i can't think or concentrate or even remember things one moment to the next and this is happening even when im sober. It is definitely a side affect of alcohol so I don't know if that is what you mean by your 'lifestyle' contributing to your issues but that is the case for me. Vitamin B's are important from what i've read but it would be nice to hear from others. Good luck to you.

try focus factor for starters. then go to a nutrition center and they should have some energy pills which will also help you with these problems. you can also ask anyone who works at a nutrition center. that is a common worry for people so they have several options for everyone...