Any amount of caffeine above 400 milligrams per day is considered too much caffeine.
Healthy adults can consume safely up to 400 milligrams or mg of caffeine per day and be okay.
Up to 400 milligrams (mg) of caffeine a day appears to be safe for most healthy adults.
That's roughly the amount of caffeine in four cups of brewed coffee, 10 cans of cola or two "energy shot" drinks.
The most expensive coffee in the world is kopi luwak.
The Kopi Luwak coffee has prices prices ranging between $35.00 and $100.00 a cup, or about $100.00 to $600.00 a pound, kopi luwak is widely considered to be the most expensive coffee in the world.
Indonesian coffee producers have claimed for generations that the kopi luwak method produces the best tasting coffee in the world.
Kopi Luwak coffee is expensive because of a combination of high demand and the limited quantities of Kopi Luwak that the civets can produce naturally.
It is produced from the coffee beans digested by civet cat.
The feces of this cat are collected, processed and sold.
It is highly priced because it is claimed to be more nutritious and high cost involved in sourcing the animal dropping, wastage during processing and quality certification.
By the time your coffee has reached your hands, many people have picked, processed, and handled the coffee beans used to make your morning Joe.
With the cost of labor steadily rising, the wholesale cost of coffee will inevitably rise as well.
Kopi luwak is made from coffee beans plucked from civets' feces.
This is bad news for civets.
It's the world's most expensive coffee, and it's made from poop.
Or rather, it's made from coffee beans that are partially digested and then pooped out by the civet, a catlike creature.