I flew from LAX to Calgary and back, plus a short hop from Lethbridge. I carried five peptide pens in a chilled insulin travel case with a medical tag attached. The peptides were Tirz, BPC-157, NAD+, and 5amino. At LAX they never even pulled the case out. In Lethbridge they asked what it was, but once I said it was medicine that needed cooling and pointed to the tag they put it straight back in my bag.
Has anyone flown with Tirz or Reta between the UK and US? Any problems at security?