Hi, I just did an advanced search of the forums for any occurrence of "edible gold luster" and a number of forum posts came up: http://cookieconnection.juliau...agination.sort=SCORE
I think you will find some of this info in these posts, but, if not, we can see what others say here. I don't have much to add to what's in these other posts though - I don't know of any FDA-approved dusts myself other than Wilton (I doubt any small companies subject themselves to a formal FDA approval process and the associated costs, but I could be wrong). I typically just steer clear of ones labeled "for decorative use only", "not for consumption", etc. Some say they are for consumption, but this doesn't necessarily mean the FDA tested and approved them either.
I also just posted a topic about a recall of some Rolkem gold dusts because of edibility issues: http://cookieconnection.juliau...ld-special-rose-gold
P.S. There should be NO broken links to any forum topics on this site (it's impossible to break an internal site link unless it was mistyped by someone). So if you could send me all the broken links that you found (directing to somewhere on this site), I would like to check and correct them. I don't need broken links to other sites, as I cannot control those links.