Serotonin is overrated and things like SJW or 5HTP can have dangerous effects on your brain and heart. The increase in agressive behaviour has also been linked to the overprescription of antidepressants.
Anyway, SJW makes me feel hot waves, agitated and restless. So does every ADs (I never take more than 1 serotonin boosting thing!).
In fact my POIS symptoms have become a thousand times *worse* after trying ADs, SJW, 5HTP supplements et al. bs "therapies" (one after the other with detoxes/rests between them, not at the same time!).
Not only that, but as a result I no longer can tolerate any of them as they've altered my chemistry so now I react even to Serenoa repens - a herb for the prostate that apparently also works on serotonin receptors.
I can get agitated, have hot flashes and get stomach cramps and sudden muscle movements and delirium now even from drinking peppermint and chamomile tea at the same time (they work on serotonin)!
I really hope that one day the damage serotonin boosting suplements have done to my body will get reversed! I hope I find some Cyproheptadine here, it's said it not only removes useless serotonin, it extends one's livespan (while serotonin shortens it).