Lipotrim works and when you successfully lose weight you may feel colder than when pre-diet.
Feeling colder than expected is a natural body reaction to any calorie restriction (ie any weight loss diet). When you restrict calories you reduce the amount of heat produced, your metabolic rate, by a small amount. In addition as fat is lost through successful weight loss so is your natural insulating layer.
The best way to warm up is to drink hot fluids (Note: Water, black tea and black coffee is only allowed on the Lipotrim Total Food Replacement Programme).