Does coffee actually keep you awake?

Question

Does coffee actually keep you awake?

Answer 1

it makes me sleepy lol so not sure  

Answer 2

Coffee has caffeine which is a stimulant. It should help keep you awake. However there are other factors.

1. It can depend on how much sleep you get. If you have had very little sleep then caffeine will only do so much. There is no replacement for sleep and at some point caffeine won't work any more.

2. Caffeine dehydrates us. When we are dehydrated we become tired. If not offset by extra water then we can still feel tired after having caffeine.

3. Caffeine sensitivity also factors in. Some people are naturally more sensitive or tolerant to caffeine. Some people are wide awake and very energetic with just the slightest amount of caffeine and others need a few drinks to notice a difference. Many of these people of also consume a large amount of caffeine so are just use to it.

Answer 3

It doesn't keep me awake, but I have a high caffeine tolerance.