Serotonin is the hormone what makes us happy, so why aren’t we just injecting it into our body/taking it as tablets to get out of misery on command?
In: Biology
Among other reasons that others have discussed, Serotonin wouldn’t make it past the “Blood/Brain Barrier” so it wouldn’t travel from the bloodstream to the brain. So just on a practical level injecting it or giving yourself a shot isn’t an option.
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