Lilly’s hot weight loss drug Zepbound (tirzepatide) may be one of the most effective drug therapies for weight loss. In an open-label 36-week study, participants lost an average of 20.9% of their body weight in 36 weeks. With an average weight of 107.3 kg (236.5 lbs), that equates to about 22.4 kg (49.4 lbs) on average.…