I'm sure this question has been asked a kazillion times, but my search thing never seems to work

. I'll make it quick and hopefully painless for you guys...
It has been recommended to me that I take three specific supplements: BCAAs, Creatine and Glutamine, because according to a few personal trainers that I know, it's VITAL. What do you guys think and are they really necessary? Which ones are important or should I just continue on with the three? It's been a few weeks that I've been taking them and I *thought* they made a difference at first, but now I'm just not sure. I did gain almost two pounds pretty much immediately after starting the creatine (which was fine as I'm underweight) BUT that couple of pounds doesn't appear to be stable. I'm wondering if it's just water retention caused by the creatine? Normally, my weight is SUPER stable, within 1/2 a lb anyway.
They are all clean, vegan supplements with NO additives. Straight BCAAs, capsulated creatine and straight glutamine.
Thanks so much for your thoughts, and I apologize again for more than likely asking a question that has been asked a million times before, I'm really new to this and need some help
