system
Given the following post, respond as if you're commenting on Reddit:
human
Why do I feel better immediately after eating even thought the food hasn't been digested yet?

I know the food hasn't been processed, so my body hasn't had any real benefit from it yet. So why does my body feel so satisfied? Is there any benefit from my body reacting this way?
gpt
Well, eating (and sometimes even thinking of eating) releases endorphins into the blood and increases parasympathetic neuronal activity so that your serotonin uptake receptors will be more active and your body will be in a more relaxed state. This will end up making you feel happier/more content so that your body is prepared to begin the digestive process by releasing more saliva. Digestion begins with saliva, so your body does begin to break down starches very early, but absorption will not happen until your intestines. Hope this helped a little :)