Can Coffee Make You Gain Weight?

Overview
Some prestigious medical researchers have great news for people looking to lose weight and keep coffee in their diet. You can. A plain cup of brewed coffee contains zero fat and only a couple of calories. Some studies suggest coffee, tea or cola generate more body heat resulting in the loss of calories.
Warning
Katherine Zeratsky, a dietitian at the Mayo Clinic, says it's what some put in coffee that can lead to problems. One tablespoon of whipping cream adds more than 50 calories and 5 grams of fat to a cup of coffee, and 1 tablespoon of sugar adds nearly 50 calories. On the other hand, one tablespoon of fat-free milk adds only 5 calories.
Benefits
The news is even better of diabetics as research shows coffee consumption can reduce the risk of type-2 diabetes, improve normal metabolism of glucose, or both, according to the coffee and tea industry in England.
Theories/Speculation
While the link between caffeine, increased body heat and resultant weight loss is clear, scientists cannot explain how caffeine produces these effects. The experiments so far indicate that, in large part, the thermogenic effect of caffeine may be due to increased heart rate and increased production of lactate and triacylglycerol.
Types
Both instant and brewed coffee are supposed to have the same results, according to researchers.
Fun Fact
A 16-ounce caffe latte espresso made with fat-free milk contains 130 calories and 0 grams of fat. The same drink made with whole milk contains 200 calories and 11 grams of fat.
Resources
reference
It's What Some Put in Coffee
reference
Coffee Consumption Can Reduce the Risk of Type-2 Diabetes