Hi S.Costello

Belly fat (sometimes called visceral fat) is a metabolically active tissue. That means that it produces a number of signalling molecules (variously called cytokines, hormones...) - excess levels of these are linked to a number of serious health issues. The contrast is with sub-cutaneous ("under the skin") fat, which is mainly an energy store.

I agree with glok that talking with a nutritionist is a good idea.

You might find the information here helpful before you talk with a nutritionist or other health professional: How to Lose Belly Fat: Tips for a Flatter Stomach .