Do vitamin c tablets really help a come down?

I hear that vitamin c tablets help a come down but do they really work? I am already using 5-htp but am thinking about trying vitamin c tablets too. Is it worth it?
Was looking at this page:

http://www.hollandandbarrett.com/pages/categories.asp?cid=68&searchterm=vitamin c&rdcnt=1&page=1
Would the powder or tablets be better?

They more than likely won't have more than a placebo effect, I doubt you will notice any benefit from taking it.

Im not sure but I heard that vitamin C helps with a hangover from alcohol as do certain B vitamins so maybe works for comedowns too. I think the bodies adrenal glands contain a lot of vitamin c so if your body is is under strain then possibly it may need extra vitamin c....just a guess.

Also, 6 heavy nights out in a row resulting in me and my friend getting chest infections....and I know vitamin c is good for the immune system so makes sense that it would help with a comedown

it will definately help an MDMA/XTC comedown as that drug depletes/uses up loads of vitamins... even more so if your out dancing/raving all night.... better yet you can get those multivitamine tablets... my parents had a load i used to take a couple after a gram of MDMA comedown, it really helped for later in the day (i would get back usually mid morning from a rave, take some benos for immediate relief, try to catch a couple hours sleep, wake up and feel allright as the vitamins revitalise your body

So is vitamin c pretty useless after the use of stimulant drugs?