If i want to transfer money from euros to pesos, and its asking me the payment currency, what does it mean? The currency from its taken or recived?
It is easily available; you can get it from energy drinks, coffee, tea, coke. It's extremely effective in increasing your energy before a workout because it is such a fast acting substance. Caffeine increases your mental alertness. However, a word of caution, caffeine only offers a temporary boost of energy.
If you want to boost your morning metabolism, try eating breakfast. A breakfast of complex carbohydrates such as fruit or whole grains will rev things up as your digestive system works to break food down. Eating at regular intervals throughout the day will maintain the elevated levels.