Television announcer al roker and singer carnie wilson have both undergone stomach stapling, or gastric bypass surgery, as a radical and invasive approach to weight loss. previously, weight loss was not usually considered a medical problem that could be addressed through surgery. this is evidence of:

This is evidence of medicalization and the social construction of health and illness.
In general, a person is considered as healthy if we have a thin body. In this particular case, the person who did the procedure will definitely had thinner body after the procedure, but it definitely created health risk for them.
So, we could say that being thin does not necessarily healthier.