It is a weight loss drug primarily. There are other effects observed and it seems to be something people are experimenting with. I'm not fully convinced this drug is fully understood.
That may be true, but this isn't exactly a new drug overall. It has been available as a diabetes treatment since about 2005. So we should have some longer-term data on the topic.
It’s a weight loss drug primarily by reducing appetite, but I believe there are also metabolic effects being discovered, and slowing of the metabolism increases longevity.