A latte or cappucino can be okay as long as you make sure to ask for it unsweetened, and then use your own stevia if you need a light sweet taste.  Since almost every coffee shop only has either sugar or artificial sweeteners as options, I always carry packets of stevia on me when I know I might be getting coffee at a coffee shop on a particular day.
Drinking coffee on an empty stomach is an unhealthy habit that can lead to various health risks, like a damaged stomach lining and increased anxiety. Luckily, you can prevent these potential risks by making sure to eat breakfast before enjoying your morning cuppa. That being said, it's important not to drink coffee excessively throughout the day, and avoid drinking it past 3 p.m. so that you don't interrupt your sleeping schedule.
It’s enough to make a tea drinker buy an espresso machine. In a new study scientists in Germany report they were able to modify a common age-related defect in the hearts of mice with doses of caffeine equivalent to four to five cups of coffee a day for a human. The paper—the latest addition to a growing body of research that supports the health benefits of drinking coffee—describes how the molecular action of caffeine appears to enhance the function of heart cells and protect them from damage.

Coffee has also been linked to lower risk of dementia, including Alzheimer’s disease. A 2009 study from Finland and Sweden showed that, out of 1,400 people followed for about 20 years, those who reported drinking 3-5 cups of coffee daily were 65% less likely to develop dementia and Alzheimer’s disease, compared with nondrinkers or occasional coffee drinkers.
Some curious minds wanted to know exactly who was protected. And why? How? These studies showed that in people with Type 2 diabetes coffee intake was correlated with insulin spikes and increased blood sugar after a meal. Further research has shown that the caffeine in coffee might be the culprit responsible for the secretion of higher levels of insulin from the pancreas.
You don’t have to be a trained cardiologist to see that that coffee supports heart health. This, it does so by protecting the heart’s muscular chamber against artery damage that may result from inflammation. This way, various heart diseases are warded off including common ailments such as hypertension, thrombosis, heart attack, heart failure, among others

First, you may have seen debate in the past about how coffee has some compounds in it that could have negative health effects such as small amounts of acrylamides or other possibly harmful compounds in brewed coffee.  But, the good news is that coffee has such high concentrations of beneficial antioxidants, phenolic nutrients, chlorogenic acids, and other healthy compounds , that it more than counteracts any bad compounds. 

"Caffeine for treatment of Parkinson disease" Ronald B. Postuma, MD, MSc, Anthony E. Lang, MD, Renato P. Munhoz, MD, Katia Charland, PhD, Amelie Pelletier, PhD, Mariana Moscovich, MD, Luciane Filla, MD, Debora Zanatta, RPh, Silvia Rios Romenets, MD, Robert Altman, MD, Rosa Chuang, MD and Binit Shah, MD. doi:10.1212/WNL.0b013e318263570d August 1, 2012. Abstract. Accessed 15 December 2013.
Similar to adding grass-fed butter, coconut oil is loaded with healthy fats, specifically medium-chain triglycerides (MCTs). These MCTs have been linked to improved weight loss in multiple scientific studies. When it comes to brain health, coconut oil may also be largely beneficial. Some studies have examined the potential links between reduction in Alzheimer’s disease rates and daily ingestion of coconut oil.
The healthiest way to take your coffee is, of course, black. But if you can’t stand the taste of the bitter grounds on their own, we have a few pieces of good news for you. Firstly, some studies show that probably means you’re not a psychopath — congratulations. But secondly, there are other healthy options out there to add flavor to your beverage — without adding heaps of sugar.
The popularity of the Bulletproof Diet is undeniable. But what started the craze was the world-famous Bulletproof Coffee. By simply adding grass-fed butter to black coffee, you will get a nice brain-boosting buzz — as well as all the health benefits of grass-fed butter. Try blending the coffee with a handheld blender or latte frother if you are stuck with globs of butter on top of your coffee.
Constituents in coffee can interfere with normal drug metabolism and detoxification in the liver, making it difficult to regulate the normal detoxification process in the liver. Another issue to be aware of with coffee intake is how certain medications such as levothyroxine (thyroid) as well as tricyclic antidepressants are poorly absorbed, making symptoms curiously worse for patients.
Men who drink coffee may be at a lower risk of developing aggressive prostate cancer. In addition, new research from the Harvard School of Public Health suggests that drinking four or more cups of coffee daily decreased the risk of endometrial cancer in women by 25 percent as compared to women who drank less than one cup a day. Researchers have also found ties between regular coffee drinking and lower rates of liver, colon, breast, and rectal cancers.
I also tried his Bulletproof Coffee which is much smoother than regular coffee and which he claims is produced carefully to avoid the presence of mycotoxins: “Most coffee beans are processed by either leaving them in the sun and elements to wither and dry, or by pressing them and letting them ferment (spoil) to remove the outer layer of the bean. Both of these techniques are known to produce significant levels of mycotoxins as they enhance flavor. Upgraded coffee beans are mechanically processed right after picking using only clean cold water. This more expensive process is safer because it dramatically reduces harmful molds or bacteria from impacting your health.”

If you’re constantly resisting down the urge to hit your bloodstream with caffeine, relax. It’s really okay to get a steady stream of java—so long as you’re stopping at a reasonable time before bed (typically 2 p.m., since coffee has a half-life of 8-10 hours), not swallowing a pot a day, and avoiding syrups and artificial sweeteners (check out these 15 ultra-healthy add-ins instead). And we’re not just saying so because the energy jolt is just that good. Coffee also has a slew of health benefits.
It’s in your best interest to learn and put these mindfulness exercises into practice. Now that our habitat has become too technological and many people just don’t want to unplug, engaging in daily prayer, celebrate your friends’ victories, and listening to your spouse are among the best ways to be mindful about what you are doing and how you are living.
After the researchers induced myocardial infarction in the mice during their experiments, the extra stores of p27 in the caffeinated cells apparently prevented damaged heart muscle cells from dying. The paper says the mitochondrial p27 also triggered the creation of cells armed with strong fibers to withstand mechanical forces, and promoted repairs to the linings of blood vessels and the inner chambers of the heart. To confirm the protein’s importance, the scientists engineered mice with a p27 deficiency. Those mice were found to have impaired mitochondrial function that did not improve with caffeine.
“It has not really been shown that coffee drinking leads to an increase in antioxidants in the body,” Lane tells WebMD. “We know that there are antioxidants in large quantities in coffee itself, especially when it’s freshly brewed, but we don’t know whether those antioxidants appear in the bloodstream and in the body when the person drinks it. Those studies have not been done.”
The study builds on earlier work in which the two scientists showed caffeine ramps up the functional capacity of the cells that line blood vessels. The drug does so by getting into cells and stoking the mitochondria, structures within the cells that burn oxygen as they turn glucose into energy.“Mitochondria are the powerhouses of the cells,” Haendeler says. One of the things they run on is a protein known as p27. As Haendeler and Altschmied discovered (and describe in the current paper), caffeine works its magic in the major types of heart cells by increasing the amount of p27 in their mitochondria.  
Feeling a little slow lately? All it might take to get your body back to working at a normal pace is a little coffee. A 2005 study from the Radiological Society of North America found it doesn’t take much—just a couple cups—to improve your reaction time, making you better at everything from noticing something scary like smoke in your home (and realizing you need to grab the fire extinguisher ASAP) to breaking your car for a stop sign.
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