I think the only advantage of handstand is to let the blood wash away the brain.

Strengthen cerebral blood circulation.

It's good for the head organs and the brain.

But you said you could lose weight.

I don't think there is any logic.

The only theory about losing weight may be that the arm supports the body, and it will consume a certain amount of energy when standing upside down.

But it is impossible to lose weight at such a cost.