This seems to be combining a couple of studies; the primary one seems to be 40 people over 6 weeks using the petals of saffron (but in another place said "leaves", so I'm not sure which is correct), but it's interesting that the petals have the effect and not just the stigma which is what is called "saffron" for cooking
They also mentioned that it _might_ work by affecting serotonin in the brain, but no one actually knows yet; and in the conclusion they mention how this is only a first step at understanding the effects.
So: looks kind of promising, but by no means a finished study yet. (also there were warnings about taking too much as it can be toxic and damaging for pregnancy so... read that carefully before buying some I suppose :) )
They also mentioned that it _might_ work by affecting serotonin in the brain, but no one actually knows yet; and in the conclusion they mention how this is only a first step at understanding the effects.
So: looks kind of promising, but by no means a finished study yet. (also there were warnings about taking too much as it can be toxic and damaging for pregnancy so... read that carefully before buying some I suppose :) )