This is a common problem in Peat world - many people come to Peat (or simply resume normal eating habits) after years on a Paleo (or anothew low carb diet). The result is often weight gain, and this study shed some light on the mechanisms.
http://www.nutritionandmetabolism.com/c ... 6/abstract
http://www.nutritionandmetabolism.com/c ... 6/abstract