adenosine

That means that it makes it harder for your body to re-absorb adenosine in your bloodstream.

I still get crazy tired later in the day despite my large caffeine intake, so, for me, it seems the adenosine has won.

I would think you would have to look up at what point your adenosine maxes out and what amount of daily caffeine intake that requires.

So in the morning, when there is very little adenosine in your blood to begin with, more or less caffeine will not have much effect.

Like increased blood flow to the brain, which helps with various things regardless of the fact that blocking adenosine receptors is doing jack shit.

I wonder if it's the increased number of adenosine receptors, combined with lower amounts of dopamine.

From what I've read, when you block your adenosine receptors with caffeine, your body responds by creating more receptors and more adenosine.

It does happen to be a retrograde neuroinhibitor for adenosine, but to date, there's no evidence that this has negative long term health effects...

If build up of adenosine can alleviate depression, can its opposite cause or aggravate depression?

Additionally, as its an adenosine antagonist, its effectiveness skyrockets the later in the day you have it in you.

I knew it blocked the adenosine receptors, but I didn't realize it actually triggered adrenaline and dopamine release.

It seems like there must be a reason why the adenosine signals that it's time to sleep - like your brain actually needs that rest to recuperate properly after activity.

Late morning is the only place it starts working as its an adenosine antagonist, and you don't start getting adenosine in any really effective amount in your brain until then.

Wikipedia has more detail, but effectively, your body will adapt to regular caffeine intake by increasing the number of adenosine receptor sites.

But after you've been awake for a long time and there's more adenosine in your blood, increasing the amount of caffeine will not have as much effect because your body already has a lot more receptor sites, it's got some resistance to the effects.

However, majority of people little realize that it works well in your struggle with the adenosine-related homeostatic component of sleepiness, while it is quite inefficient in overcoming circadian sleepiness!