The short answer is, yes. Both caffeinated and decaffeinated coffee can play a role in helping people to lose weight as well as reduce the risk of adult-onset diabetes according to a number of medical studies.
The long answer is as follows...
Coffee actually contains a wealth of naturally-occurring compounds including several classes of antioxidants known to have a preventive factor against mild depression, Parkinson’s disease, and colon and rectal cancers. But, this new study now points out that some compounds in coffee also help to and enable steady weight loss, regulate blood glucose and reduce fat production. These compounds that are responsible for the weight-controlling effects of coffee are antioxidants known as the chlorogenic acids, which appear to slow the production of glucose in the body after a meal, by modifying the activity of certain enzymes in the liver.
In addition, the chlorogenic acids cause a more slow and sustained release of glucose into the body after eating, thereby reducing the production of new fat cells. So, it stands to reason and research, that it would be sensible to drink a caffeinated or decaffeinated meal after a meal. This will cause a suppression of glucose production and release, as well as causing the body to produce more gastric juices, which of course aids digestion.
For example, the Phytothérapie scientific French reported a clinical review, which demonstrated fat-reducing effects of a green (non-roasted) coffee bean extract. One group was given 400 mg of decaffeinated green coffee extract daily whilst the second group was given a placebo. After 60 days, participants who received the decaffeinated green coffee extract had lost 5.7 % of their initial weight, and the group that had received a placebo had lost 2.8 %of their initial weight. This shows a steady decrease in weight as a result of the use of green coffee extract. Furthermore, since the extract was decaffeinated, the weight loss does not appear to be connected with the calorie-burning effect noted with caffeine.
Gaining weight can sometimes be indicative of a danger of getting Type 2 Diabetes. And here too, decaf coffee, can act as a preventive factor in type 2 diabetes.The Annals of Internal Medicine Journal from Harvest University found that drinking coffee – caffeinated or decaffeinated - daily reduces the risk of the disease. Likewise, the American Medical Association Journal discovered that regular coffee consumption is associated with a lower risk of developing type 2 diabetes.
And the list goes on. There are a number of other studies from scientists from all over the world, which point to the same conclusion.