I am in the US; tried sema with RSC and they were good at first but their prices skyrocketed. I also didn't have great efficacy with my second vial as the first. Then tried terz with RPO ("research pep only") and it was basically INEFFECTIVE. I am skeptical to try anything else b/c I've wasted hundreds at this point and have been doing this for 5 months and lost only about 10lbs :(. Any specific recommendations of very effective sites you've used would be SO greatly appreciated! So glad I found this site/forum!