Is there a proven way to get rid of extra skin?

For a few months now I have been more active with a new job, and also recently started training at the gym again. After 10 days or so of harder training and healthy eating, I have lost a fair bit of weight.

I’m about 35% towards the finish line in terms of burning fat, I have lost 30 kilos so far (66lb), but still have another 40 or so to go. (no need for health warnings, I’m being closely monitored by my trainer, who assures me that for someone as tall as me, with the watery fat I have, that what I’m doing is safe)

The problem is coming in the form of excess skin around my stomach, it’s starting to form a bit of a pocket. My trainer tells me that the body will deal with it on it’s own, but I already knew that.

The question is, other than time, how can I eliminate excess skin? I don’t trust the sites selling potions and things.