There's no health advantage to changing your weight if you are still living the same type of lifestyle that you were in before the change occurred. If you have vices (e.g. smoking, drinking) before losing the weight and you are still into them, then the long-term concern that you will have is on your general health already. Vices affect how your body and your organ systems react to the stimuli you put inside your body. If you cannot give them up then be prepared to suffer more health consequences.
There's no health advantage to changing your weight if you still have bad food choices. Losing weight requires you to have a constant awareness about what food is good and beneficial to you. Constantly choosing what and when to eat ensures a continuous and healthy improvement in your body.