Poppy seeds are rich in fibre, which may help to combat sluggish digestion as well as decrease appetite.

Since leptin and insulin decrease appetite and ghrelin increases appetite, some researchers suspect that eating large amounts of fructose increases the likelihood of weight gain.

The effects, exhilaration and decreased appetite, wear off after half an hour so users keep topping up.

I turn to my old friend the internet to check the dose (one or two pills) and side effects (insomnia, decreased appetite, anxiety, headache and rapid heartbeat).

This halts their dopamine release, and thereby serotonin decreases appetite.