The latest scientific research has found that the popular beverage coffee can lower the risk of developing metabolic syndrome and type 2 diabetes.
Metabolic syndrome is a cluster of risk factors that occur together such as dyslipidemia, hypertension, high blood sugar and excess body fat around the waist, which increases the risk of developing cardiovascular disease, stroke and diabetes.
With the increasing prevalence of metabolic syndrome and type 2 diabetes worldwide, the important question on the minds of many health conscious coffee lovers, is what effect their favorite beverage has on overall metabolic health.
The good news for coffee lovers is that it appears from a growing body of research that moderate coffee consumption actually reduces the risk of developing metabolic syndrome and consequently type 2 diabetes.
Now before everyone rushes out and starts over-indulging in the sugar and fat-rich latte’s, which of course would be counterproductive for metabolic health, it is worth noting that it is only moderate coffee consumption(1-3 cups daily) which appears to be healthy. High and excessive coffee consumption(>4 cups daily) may actually have adverse effects on health according to some studies.
In a recent State-of-the-Art review, a moderate coffee consumption (2 to 3 cups per day) has shown potential benefits on cardiometabolic disease, cardiovascular health, and all-cause mortality. 
Recent research has also found that moderate coffee consumption can increase levels of master antioxidant Glutathione.
The study also found that moderate coffee intake isn’t associated with an increase in plasma homocysteine, which is another independent cardiovascular disease risk factor. So this is more good news for those who enjoy the occasional cup of coffee and want to prevent heart disease. 
Overall the consensus from the current scientific literature concludes that coffee can reduce the risk of developing metabolic syndrome, obesity and type 2 diabetes.
Here are some of the key statements from the studies(referenced below):
Of the most-consumed beverages in the world, coffee contains more than 1000 components such as caffeine, chlorogenic acid, diterpenes and trigonelline.
It has been proven in many studies that coffee consumption has a positive effect on chronic diseases.
It is reported that consumption of coffee in adults up to three cups a day reduces the risk of Type-2 diabetes and metabolic syndrome. 
A Mendelian randomization study from 2015 also concluded:
High coffee intake was associated observationally with low risk of obesity, metabolic syndrome and type 2 diabetes, and was associated observationally with related components thereof, but with no genetic evidence to support corresponding causal relationships. 
 Coffee and metabolic impairment: An updated review of epidemiological studies
 Moderate coffee consumption increases plasma glutathione but not homocysteine in healthy subjects.
 How coffee affects metabolic syndrome and its components.
 Coffee intake and risk of obesity, metabolic syndrome and type 2 diabetes: a Mendelian randomization study.
 Association between the Prevalence of Metabolic Syndrome and the Level of Coffee Consumption among Korean Women
The information in this article has not been evaluated by the FDA and should not be used to diagnose, cure or treat any disease, implied or otherwise.