system
Given the following post, respond as if you're commenting on Reddit:
human
Could we measure happiness with serotonin, dopamine, oxytocin and endorphins?

A lot of studies use self reporting to find out people's happiness but isn't that not very accurate since there could be different cultural definitions and feelings of happiness? I read the "Geography of Bliss" in high school and the Swiss had reportedly high levels yet their definition of happiness was much more mellow and contented. I realize there are other questions used and not just "how happy are you?" like life satisfaction scale and purpose scale which I skimmed through but I am just wondering wouldn't chemical levels be statistically more accurate? Is it impossible to be sad if your happy hormones (SDOE) are high?
gpt
PhD in neuroscience here. 

The answer is no. Also, those aren't hormones, they're neurotransmitters (well, oxytocin is kind of hormone-ish), and there's a big difference between hormones and neurotransmitters. Hormones can have a "general function", neurotransmitters do not. Serotonin, dopamine etc. are not tied to happiness, anyone who tells you that has no idea what they're talking about.

Anyway, if you want to know how happy someone is, asking them how happy they are is going to be about a million times more accurate than any kind of biological marker.