Indeed, I myself working with elite triathletes such as Alan Ingarfield (at the time one of the fastest UK Ironman athletes in his age group) - believed that carnitine could enhance performance and in 1993, I suggested it helped athletes in several ways, including increased fat metabolism and faster recovery (2)
The other half were given weekly injections of increasing amounts of semaglutide: 0.25 mg for 4 weeks, then 0.5 mg for 4 weeks, and then 0.5 or 1 mg in the last week, depending on a doctors judgement
Drug companies spend a lot of time and money on smart scientists and many, many safety tests
Seal the vial in a puncture-proof container (a sharps container or a rigid plastic bottle with a screw cap)
While both Semaglutide/GLP-1 and phentermine are combined with diet and exercise to help with weight loss, there are some distinct differences between the two