It depends on who you ask. I take unstandardized. Some herbalists I have read suggest standardized and some unstandardized. I think it also depends on what it is being taken for. For men with prostrate problems it may be better to take standardized but personally I think for our situations unstandardized is fine (and cheaper)
I have not read specifically about the combo of garlic and papaya but I think I read garlic was helpful (in many ways over and above weight loss) I think papaya is a digestive enzyme so it helps your food digest faster and therefor move through your body faster.
I have typed up a post on herbs for weight loss somewhere...I will see if I can find it and bump it up for you.

Sheri