Guild Wars 2

One how does HGH effect elixir gun, is it when you equip the kit, or use an ability?

2 any advice on elixir builds, I do kind of enjoy chucking potions XD

also style wise are there any backpacks that would look fitting for an alchemist?

Only the elixir skills from the elixir gun give you the HGH benefits (healing mist, acid bomb and super elixir (the tooltip says they are elixirs)). healing mist and super elixir also get affected by alchemical tinctures.

If you want build advice you first need to tell us for what game mode (pvp , wvw, pve content …).

The antitoxin injector looks like the ideal alchemist backpack. Dont know how to get the skin if you werent around during the Tower of Nightmares living world events though.
http://dulfy.net/wp-content/uploads/2013/12/gw2-antitoxin-injector-2.jpg

Mostly right now pve duoing XD we are trying to get more friends, but we are still fairly early level wise(like 30ish) so mostly wandering around the open world.
Does it give someone else the might from hgh if they are in the healing mist or just me?