Anonymous wrote:"You look great" is fine. Nothing else is needed. You do not need to specify the way in which they look great.
Not all weight loss is positive, sometimes people are sick. And definitely don't say "you look healthy" or anything loaded like that.
Anonymous wrote:Do not say anything about weight loss please. Not all weight loss is positive, for one.
You can always say, "you look happy” or “you look like you’re in a good mood, how are things?” (Assuming their face actually shows happiness)
Anonymous wrote:You look great is okay, but I wouldn’t comment on weight otherwise.
Anonymous wrote:I have been up and down in weight and people telling me I look so great for having lost weight make my heart sink a little. I still see myself as a fat person on the inside and it feels like a total insult.
Anonymous wrote:"You look great!"
(if you really think they do - otherwise you don't say anything)