Complex sentence: Many have succumbed to this vast international scam and have claimed many unsuspecting customers; who still, through a placebo effect have sworn by their new found well being and strength that their untested and recklessly purchased HGH investment works.
Split into simpler sentences: Many have succumbed to this vast international scam and have claimed many unsuspecting customers. And these customers still, through a placebo effect have sworn by their new found well being and strength that their untested and recklessly purchased HGH investment works.