As noted here, numerous studies have highlighted the potential health benefits of caffeine. Meanwhile, centuries of caffeine consumption and extensive study of the ingredient further reinforce its safety. In other words, the billions of people who routinely consume caffeine can continue to do so with confidence and the knowledge that the ingredient may even enhance health.
A Pharisäer (Danish: farisæer), meaning a Pharisee, is an alcoholic coffee drink that is popular in the Nordfriesland district of Germany. It consists of a mug of black coffee, a double shot of rum, and a topping of whipped cream. In 1981, a court in Flensburg ruled that 2 centilitres (0.70 imp fl oz; 0.68 US fl oz) of rum were not sufficient for preparing a genuine Pharisäer.
So I’m doing Keto and intermittent fasting so I’m trying to make the switch. I’ve gone to a Guatamalian lightly freshly roasted coffee; burr ground by hand just before I pour the water over the grounds and wait 45 sec to let it bloom; then pouring the rest of the water through it. I’m still finding it too bitter. I used 6 tablespoons for ~ 3, 8 oz cups. Should I try and adjust my grind, or the amount of coffee I add to the water to try and tamp down the strong bitter taste?
Espresso is very strong black coffee that is drank from a small cup. The best kinds of coffee blends for espresso creation are the dark roast aromatic beans from Latin America, although this is still subject for debate among coffee lovers. Espresso is created by subjecting the beans to high-pressure steam treatment. The characteristic feature of espresso is the creamy foam on the top and the strong aroma. Espresso is meant as a pick-me-up drink rather than for leisurely drinking.
Many studies have proven that drinking caffeine during pregnancy might affect the growing fetus. Black coffee, being a rich source of caffeine, can increase the metabolic activity and heart rate. The growing fetus does not have enough strength to withstand this increase in heart rate. Black coffee and other caffeine drinks must be avoided during early pregnancy.
Arabica coffee, which accounts for about three-quarters of the coffee cultivated worldwide, is grown throughout Latin America, Central and East Africa, India and, to some extent, Indonesia. Robusta coffee is grown in West and Central Africa, throughout South-East Asia and, to some extent, in Brazil. These are only two of the many kinds of coffee grown all over the world.
Women who drank more than 4 cups of coffee per day, had a 20 per cent lower risk of becoming depressed. The reason being the caffeine, a natural stimulant which stimulates the central nervous system and increases dopamine levels  . An increase in dopamine levels removes the symptoms of depression and anxiety  . And due to this people are less likely to commit suicide .
Some health benefits of coffee come from the beverage's caffeine content and not necessarily from the coffee itself. For example, the review of studies published in Australian & New Zealand Journal of Psychiatry determined there was also a nonlinear association between caffeine and a lower risk of depression, in addition to the link with coffee itself. Caffeine, a stimulant, also has a beneficial effect on athletic performance, with research published in 2016 in the Journal of Sports Science determining that dosing with caffeine prior to physical activity increased "vigor" and decreased fatigue. To use this to your benefit before working out, drink a cup of black coffee about 30 to 45 minutes before you begin exercising.